21,22-Dihydro-21-alpha,22-alpha-epoxyvomicine 21,22-alpha-Epoxyvomicine 21-alpha,22-alpha-Epoxy-21,22-dihydrovomicine 22029-94-3 BRN 1190152 Vomicine, 21,22-dihydro-21-alpha,22-alpha-epoxy-