Maytansine

Chemical Name: (14S,16S,32S,33S,2R,4S,10E,12E,14R)-86-chloro-14-hydroxy-85,14-dimethoxy-33,2,7,10-tetramethyl-12,6-dioxo-7-aza-1(6,4)-oxazinana-3(2,3)-oxirana-8(1,3)-benzenacyclotetradecaphane-10,12-dien-4-yl N-acetyl-N-methyl-L-alaninate

Smile: COC1=C(Cl)C(N2C)=CC(C/C(C)=C/C=C/[C@@]([H])(OC)[C@@](NC3=O)(O)C[C@@](O3)([H])[C@@H](C)[C@H](O4)[C@]4(C)[C@@]([H])(OC([C@H](C)N(C(C)=O)C)=O)CC2=O)=C1