16-epi-Isositsirikine 17,18-Secoyohimban-16-carboxylic acid, 19,20-didehydro-17-hydroxy-, methyl ester, (16S,19E)- (8CI) 6519-27-3 Corynan-16-carboxylic acid, 19,20-didehydro-17-hydroxy-, methyl ester, (16R,19E)- (9CI) Isositsirikine Isositskiakine isomer K060 NSC 282700 NSC 338932