WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 407263

CAS#: 138148-68-2

Description: DM1-SMe is a potent maytansinoid microtubular inhibitor and an unconjugated DM1 as a mixed disulfide with thiomethane to cap its sulfhydryl group. DM1-SMe can be readily conjugate to the SH group of an antibody to form antibody-drug conjugate (ADC).

Price and Availability

Size Price Shipping out time Quantity
5mg USD 120 Same day
10mg USD 220 Same day
25mg USD 450 Same day
50mg USD 850 Same day
100mg USD 1550 Same day
200mg USD 2450 Same day
500mg USD 3650 Same day
1g USD 4450 2 weeks
2g USD 7950 2 weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-26. Prices are subject to change without notice.

DM1-SMe, purity > 98%, is in stock. The same day shipping out after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 407263
Name: DM1-SMe
CAS#: 138148-68-2
Chemical Formula: C36H50ClN3O10S2
Exact Mass: 783.2626
Molecular Weight: 784.377
Elemental Analysis: C, 55.13; H, 6.43; Cl, 4.52; N, 5.36; O, 20.40; S, 8.17

Synonym: DM1-SMe; DM1-SSMe; SMe-DM4,; maytansinoid derivative with ADC linker. Maytansine or mertansine or emtansine derivative; N2'-deacetyl-N2'-[3-(methyldithio)-1-oxopropyl]maytansine.

IUPAC/Chemical Name: N2'-deacetyl-N2'-(3-mercapto-1-oxopropyl)-maytansine


InChi Code: InChI=1S/C36H50ClN3O10S2/c1-20-11-10-12-27(47-8)36(45)19-26(48-34(44)38-36)21(2)32-35(4,50-32)28(49-33(43)22(3)39(5)29(41)13-14-52-51-9)18-30(42)40(6)24-16-23(15-20)17-25(46-7)31(24)37/h10-12,16-17,21-22,26-28,32,45H,13-15,18-19H2,1-9H3,(H,38,44)/b12-10-,20-11+/t21-,22+,26+,27-,28-,32?,35+,36+/m1/s1

SMILES Code: C[C@@H]1[C@@H]2C[C@](NC(O2)=O)(O)[C@H](OC)/C=C\C=C(C)\CC3=CC(N(C)C(C[C@@H](OC([C@@H](N(C(CCSSC)=O)C)C)=O)[C@@]4(C)C1O4)=O)=C(Cl)C(OC)=C3

Technical Data

White to off-white solid powder

>98% (or refer to the Certificate of Analysis)

Certificate of Analysis:

Safety Data Sheet (SDS):

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, not in water

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:


1: Wood AC, Maris JM, Gorlick R, Kolb EA, Keir ST, Reynolds CP, Kang MH, Wu J, Kurmasheva RT, Whiteman K, Houghton PJ, Smith MA. Initial testing (Stage 1) of the antibody-maytansinoid conjugate, IMGN901 (Lorvotuzumab mertansine), by the pediatric preclinical testing program. Pediatr Blood Cancer. 2013 Nov;60(11):1860-7. doi: 10.1002/pbc.24647. Epub 2013 Jun 24. PubMed PMID: 23798344; PubMed Central PMCID: PMC4260400.