Purple Book reference family · 351(a) biologic
chymopapain (Chymodiactin)
chymopapain is an FDA-licensed reference biologic from DisCure Medical, LLC.
351(a) biologicBLA 018663 DisCure Medical, LLC
Biosimilars
0
Interchangeables
0
Listed patents
0
Reference approved
1982
Reference product
Originator biologic
351(a)BLA 018663
Chymodiactin chymopapain
DisCure Medical, LLC
View full reference-product record- Approved
- Marketing
- Disc
- Center
- CDER
- Patents
- None listed
Molecular structure
RCSB Protein Data Bank
Experimental 3D structure for chymopapain from the RCSB Protein Data Bank (PDB 1YAL).

Interactive biological assembly from PDB entry 1YAL. Drag to rotate, scroll to zoom, and inspect the full atomic structure right here, with no need to leave the page.
Exclusivity & patent cliffs
Protection horizon
Reference approval
Approval date of the reference chymopapain product.
44 yr 6 mo ago
chymopapain: frequently asked questions
Reference exclusivity, biosimilars, interchangeability, and patents for this molecule, from the FDA Purple Book.
Built from official FDA Purple Book records (monthly downloads, the Advanced Search interface, and the published Patent List), with reference-product, license-type, and exclusivity context for chymopapain.
Related FDA reference tools
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- 510(k) Predicate DatabaseSearch FDA 510(k) clearances and map predicate-device lineage.
- FDA 483 DatabaseFDA Form 483 observations and inspection records by firm, date, and citation.

