19-epi-3-Oxovoacristine InChI=1/C22H26N2O5/c1-11(25)15-8-12-10-22(21(27)29-3)18-14(6-7-24(19(15)22)20(12)26)16-9-13(28-2)4-5-17(16)23-18/h4-5,9,11-12,15,19,23,25H,6-8,10H2,1-3H3/t11-,12?,15?,19?,22-/m1/s ibogamine-18-carboxylic acid, 20-hydroxy-12-methoxy-19-oxo-, methyl ester, (4xi,5xi,20R)- methyl (4xi,5xi,20R)-20-hydroxy-12-methoxy-19-oxoibogamine-18-carboxylate