英文别名Maytansine, 2'-de(acetylmethylamino)-O(20)-demethyl-2'-methyl; PDM3; Mertansine Impurity 4; Ansamitocin derivative TN-006; Maytansine, 2'-de(acetylmethylamino)-O20-demethyl-2'-methyl- (9CI); (1S,2R,3S,5S,6R,16E,18E,20R,21S)-11-chloro-12,21-dihydroxy-20-methoxy-2,5,9,16-tetramethyl-8,23-dioxa-4,24-dioxa-9,22-diazatetracyclo[19.3.1.11?,1?.03,?]hexacosa-10,12,14(26),16,18-pentaen-6-yl 2-methylpropanoate; ANSAMITOCIN DERIV 
