10,11-Dimethoxy-3-isotetrahydroalstonique acide hydrazide diphosphate [French] 72407-39-7 Oxayohimban-16-carboxylic acid, 16,17-didehydro-10,11-dimethoxy-19-methyl-, hydrazide, (3-beta,19-alpha,20-alpha)-, phosphate (1:2)