Application 212501

Type
NDA
Sponsor
INGENUS PHARMS LLC

Application Products#

Product, Drug, Ingredient table
ProductDrugIngredientFormStrengthReference drugReference standard
001CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDEINJECTABLE;INJECTION500MG/2.5MLNoNo
002CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDEINJECTABLE;INJECTION1G/5MLNoNo
003CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDESOLUTION;INTRAVENOUS2G/10ML (200MG/ML)YesNo

Source provenance: Browse the complete Orange Book source catalog · source snapshot 42.

Orange Book products#

Current product rows page 1 of 1 · 3 matching rows.

Application-product, Trade name, Ingredient table
Application-productTrade nameIngredientStrengthDosage form / routeTE codesRLD / RSApproval date
N212501-001CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30
N212501-002CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30
N212501-003CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19

Therapeutic equivalence codes#

Current TE-code rows page 1 of 1 · 2 matching rows.

Application-product, TE code table
Application-productTE code
N212501-001AP
N212501-002AP

Orange Book patents#

Current patent rows page 1 of 1 · 6 matching rows.

Application-product, Patent, Expiration table
Application-productPatentExpirationUse codeCoverage / statusSubmission date
N212501-001109939522036-02-15Drug product2021-05-04
N212501-001123297672036-02-15Drug product2025-07-17
N212501-002109939522036-02-15Drug product2021-05-04
N212501-002123297672036-02-15Drug product2025-07-17
N212501-003109939522036-02-15Drug product2022-03-28
N212501-003123297672036-02-15Drug product2025-07-17

Observed Orange Book product history#

Observed FDA ZIP history: Each table is queried independently by exact application/product key from successfully parsed Orange Book snapshots. Capture times identify archived source observations; absence or a change between snapshots is not inferred. FDA publication files that were not recoverable as structured ZIP data are not represented as states.

Product history page 1 of 3 · 110 observed states.

Captured, Edition, Application-product table
CapturedEditionApplication-productTrade nameStrengthDosage form / routeProduct TE source textRLD / RSApproval dateSource SHA-256
2026-08-18 06:07:402026-07N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19caaa826d4ba7…
2026-02-19 14:30 UTC2026-02N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19011fe1cb6892…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-3031067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-3031067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-1931067a03dcf5…
2025-08-23 18:47 UTC2025-08N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-306a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-306a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-196a471c1ec25d…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19fd3edfee7708…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19b8a1b40f171c…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-3003ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-3003ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-1903ed91905a0d…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-302680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-302680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-192680178bc6a6…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-305bbf6a4d5a75…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-305bbf6a4d5a75…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-195bbf6a4d5a75…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30d8e5a09893c0…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSAPRLD, RS2020-07-30d8e5a09893c0…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19d8e5a09893c0…
2024-10-29 15:01 UTC2024-10N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-30d06236e962d9…
2024-10-29 15:01 UTC2024-10N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-30d06236e962d9…
2024-10-29 15:01 UTC2024-10N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19d06236e962d9…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-3079d66fd596c7…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-3079d66fd596c7…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-1979d66fd596c7…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-30301d65b070ca…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N212501-002CYCLOPHOSPHAMIDE1GM/5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-30301d65b070ca…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N212501-003CYCLOPHOSPHAMIDE2GM/10ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2021-11-19301d65b070ca…
2024-06-18 03:08 UTC · 5 captures of this ZIP2024-06N212501-001CYCLOPHOSPHAMIDE500MG/2.5ML (200MG/ML)SOLUTION / INTRAVENOUSRLD, RS2020-07-301e350fbaab3a…

Observed Orange Book normalized TE history#

Captured, Edition, Application-product table
CapturedEditionApplication-productTE codeOrderSource SHA-256
2026-08-18 06:07:402026-07N212501-001AP1caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-002AP1caaa826d4ba7…
2026-02-19 14:30 UTC2026-02N212501-001AP1011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-002AP1011fe1cb6892…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-001AP131067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-002AP131067a03dcf5…
2025-08-23 18:47 UTC2025-08N212501-001AP16a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-002AP16a471c1ec25d…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-001AP1fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-002AP1fd3edfee7708…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-001AP1b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-002AP1b8a1b40f171c…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-001AP103ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-002AP103ed91905a0d…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-001AP12680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-002AP12680178bc6a6…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-001AP1d8e5a09893c0…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-002AP1d8e5a09893c0…
2026-07-26 02:55 UTC · 3 captures of this ZIP2026-06N212501-001AP1a50c72e98297…
2026-07-26 02:55 UTC · 3 captures of this ZIP2026-06N212501-002AP1a50c72e98297…

Observed Orange Book patent history#

Patent history page 1 of 3 · 114 observed states.

Captured, Edition, Application-product table
CapturedEditionApplication-productPatentExpirationUse codeCoverage / statusSubmission dateSource SHA-256
2026-08-18 06:07:402026-07N212501-001109939522036-02-15Drug product2021-05-04caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-001123297672036-02-15Drug product2025-07-17caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-002109939522036-02-15Drug product2021-05-04caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-002123297672036-02-15Drug product2025-07-17caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-003109939522036-02-15Drug product2022-03-28caaa826d4ba7…
2026-08-18 06:07:402026-07N212501-003123297672036-02-15Drug product2025-07-17caaa826d4ba7…
2026-02-19 14:30 UTC2026-02N212501-001109939522036-02-15Drug product2021-05-04011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-001123297672036-02-15Drug product2025-07-17011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-002109939522036-02-15Drug product2021-05-04011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-002123297672036-02-15Drug product2025-07-17011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-003109939522036-02-15Drug product2022-03-28011fe1cb6892…
2026-02-19 14:30 UTC2026-02N212501-003123297672036-02-15Drug product2025-07-17011fe1cb6892…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-001109939522036-02-15Drug product2021-05-0431067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-001123297672036-02-15Drug product2025-07-1731067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-002109939522036-02-15Drug product2021-05-0431067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-002123297672036-02-15Drug product2025-07-1731067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-003109939522036-02-15Drug product2022-03-2831067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N212501-003123297672036-02-15Drug product2025-07-1731067a03dcf5…
2025-08-23 18:47 UTC2025-08N212501-001109939522036-02-15Drug product2021-05-046a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-001123297672036-02-15Drug product2025-07-176a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-002109939522036-02-15Drug product2021-05-046a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-002123297672036-02-15Drug product2025-07-176a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-003109939522036-02-15Drug product2022-03-286a471c1ec25d…
2025-08-23 18:47 UTC2025-08N212501-003123297672036-02-15Drug product2025-07-176a471c1ec25d…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-001109939522036-02-15Drug product2021-05-04fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-002109939522036-02-15Drug product2021-05-04fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N212501-003109939522036-02-15Drug product2022-03-28fd3edfee7708…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-001109939522036-02-15Drug product2021-05-04b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-002109939522036-02-15Drug product2021-05-04b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N212501-003109939522036-02-15Drug product2022-03-28b8a1b40f171c…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-001109939522036-02-15Drug product2021-05-0403ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-002109939522036-02-15Drug product2021-05-0403ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N212501-003109939522036-02-15Drug product2022-03-2803ed91905a0d…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-001109939522036-02-15Drug product2021-05-042680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-002109939522036-02-15Drug product2021-05-042680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N212501-003109939522036-02-15Drug product2022-03-282680178bc6a6…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-001109939522036-02-15Drug product2021-05-045bbf6a4d5a75…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-002109939522036-02-15Drug product2021-05-045bbf6a4d5a75…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N212501-003109939522036-02-15Drug product2022-03-285bbf6a4d5a75…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N212501-001109939522036-02-15Drug product2021-05-04d8e5a09893c0…

openFDA label cross-check#

OpenFDA label data provides additional search and identifier links. DailyMed’s Structured Product Label is the canonical label on FDA.report. Matching records are deduplicated before they are shown below.

Matched openFDA labels page 1 of 1 · 2 matching rows.

Brand, Generic, Manufacturer table
BrandGenericManufacturerSPL set IDEffective dateAvailable safety fieldsJoin
CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDEBluePoint Laboratories0afd2cc7-09e6-481a-afea-9d2e3742da462025-08-07Warnings, Adverse reactionsExact identifier
application applno (NDA): 212501
application number: NDA212501
ndc (product): 68001-564
ndc (product): 68001-565
ndc (product): 68001-563
CYCLOPHOSPHAMIDECYCLOPHOSPHAMIDEDr. Reddy's Labratories Inc.a5818647-d840-e9d7-c7b8-6541b485e44e2025-03-11Warnings, Adverse reactionsExact identifier
application applno (NDA): 212501
application number: NDA212501

NDC Listings For This Application#

NDC listings for this application page 1 of 1 · 21 matching rows.

NDC, Name, Nonproprietary name table
NDCNameNonproprietary nameLabelerMarketing categoryStatus
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-519CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-520CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-521CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-521CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
50742-521CYCLOPHOSPHAMIDEcyclophosphamideIngenus Pharmaceuticals, LLCNDACurrent
68001-563CYCLOPHOSPHAMIDEcyclophosphamideBluePoint LaboratoriesNDACurrent
68001-564CYCLOPHOSPHAMIDEcyclophosphamideBluePoint LaboratoriesNDACurrent
68001-565CYCLOPHOSPHAMIDEcyclophosphamideBluePoint LaboratoriesNDACurrent
70860-218CyclophosphamidecyclophosphamideAthenex Pharmaceutical Division, LLC.NDACurrent
70860-218CyclophosphamidecyclophosphamideAthenex Pharmaceutical Division, LLC.NDACurrent
70860-218CyclophosphamidecyclophosphamideAthenex Pharmaceutical Division, LLC.NDACurrent

Documents#

Document, Submission type, Date table
DocumentSubmission typeDate
81573SUPPL 2025-03-14
81549SUPPL 2025-03-13
78939SUPPL 2024-07-01
78902SUPPL 2024-06-26
68589SUPPL2021-09-13
68573SUPPL2021-09-10
68081ORIG2021-07-14
64180ORIG2020-08-03
64161ORIG2020-07-31