TAK-700 (Orteronel) is a potent and highly selective human 17, 20-lyase inhibitor with IC50 of 38 nM, exhibits >1000-fold selectivity over other CYPs (e.g. 11-hydroxylase and CYP3A4). Phase 3.

Aristolochic acid B is one of the major components of the carcinogenic plant extract aristolochic acid, is known to be mutagenic and to form DNA adducts in vitro and in vivo.

SP-13786 is an inhibitor of fibroblast activation protein (FAP) (IC50 : 3.2 nM); also inhibits prolyl oligopeptidase (PREP) ( IC50 : 1.8 μM).