.delta.-Yohimbine 4373-34-6 (HCL) 483-04-5 (FREE BASE ) AIDS-002661 AIDS002661 Ajmalicine Indole alkaloid NSC72133 (FREE BASE) Oxayohimban-16-carboxylic acid, 16,17-didehydro-19-methyl-, methyl ester, (19-.alpha).- Raubasine Tetrahydroserpentine