10,11-Dimethoxy-19-methyl-16,17-didehydrooxayohimban-16-carboxylic acid methyl ester 3148-42-3 Dimethoxy-10,11 carbomethoxy-16 hetero yohimbane-3-alpha,15-alpha,19-alpha,20-beta [French] Oxayohimban-16-carboxylic acid, 16,17-didehydro-10,11-dimethoxy-19-methyl-, methyl ester Rauvanin Rauvanine