89.4
[1]. Leverett CA, et al. Design, Synthesis, and Cytotoxic Evaluation of Novel Tubulysin Analogues as ADC Payloads. ACS Med Chem Lett. 2016 Aug 26;7(11):999-1004.
H02-H1-H19-H
P261-P264-P270-P271-P280-P02+P2-P04+P40-P0+P1+P8-P0-P62+P64-P40+P2-P40-P01