(19 alpha)-3,4,5,6,16,17-Hexadehydro-16-(methoxycarbonyl)-19-methyloxayohimbanium 131-07-7 18786-24-8 3,4,5,6,16,17-Hexadehydro-16-(methoxycarbonyl)-19alpha-methyl-18-oxayohimbanium (inneres salz) 3,4,5,6-Tetradehydroajmalicine 58782-36-8 EINECS 242-570-5 NSC 407301 Oxayohimbanium, 3,4,5,6,16,17-hexadehydro-16-(methoxycarbonyl)-19-methyl-, (19alpha)- (9CI) Serpentine Serpentine (VAN) Serpentine (alkaloid)