InChI=1/C22H28N2O3/c1-26-19-8-7-13-12-24-10-9-15-14-5-3-4-6-17(14)23-21(15)18(24)11-16(13)20(19)22(25)27-2/h3-6,13,16,18-20,23H,7-12H2,1-2H3/t13?,16?,18?,19-,20+/m0/s methyl (16alpha,17alpha)-17-methoxyyohimban-16-carboxylate yohimban-16-carboxylic acid, 17-methoxy-, methyl ester, (16alpha,17alpha)-