• # LGM Pharma is a DM 4 CAS# 799840-96-3 API supplier distributor based in the USA. Inquire about DMF, cGMP, price, availability, samples, sourcing, purity and more.
  • # Questions? Call our customer API support number 1-(800)-881-8210.
  • # LGM Pharma offers this active ingredient but not the finished dosage forms.
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Product Details:

  • Product Name: DM 4
  • CAS #: 799840-96-3
  • Molecular Mass: 780.3746
  • Synonyms: DM 4, DM-4, DM4, N2'-Deacetyl-N2'-(4-mercapto-4-methyl-1-oxopentyl)-maytansine
  • SMILES: C[C@@H]1[C@@H]2C[C@]([C@@H](/C=CC=C(Cc3cc(c(c(c3)OC)Cl)N(C(=O)C[C@H]([C@]4([C@@H]1O4)C)OC(=O)[C@H](C)N(C)C(=O)CCC(C)(C)S)C)/C)OC)(NC(=O)O2)O
Products currently covered by valid US Patents are offered for R&D use in accordance with 35 USC 271(e)+A13(1). Any patent infringement and resulting liability is solely at buyer risk.

API’s From Quality Manufacturers:

  • Streamlined API supply towards initial research stages as well as larger quantities of cGMP material for clinical trials and product commercialization
  • Premium quality GMP certified and fully accredited API manufacturing plants


  • Technical packages as well as access to filed DMF,
    ASMF or CEP (subject to availability)
  • Regulatory and technical assistance towards any
    submission type based on specific customer requirements
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