3-Pyridinecarboxylic acid, 5-(1,2,3,4,5,6-hexahydroazepino[4,5-b]indol -5-yl)-, methyl ester, (-)-

A second alkaloid isolated from Nauclea diderrichii, this base melts over a very wide range from I 02-4°C to 172-183°C, possibly with intermediate solidifica_x0002_tion and some decomposition. A methoxycarbonyl group and two imino groups are present, one of the latter being in a reduced seven-membered ring.

Murray, Szakolcai, McLean., Can. J. Chern., SO, 1486 (1972)