72407-37-5 Oxayohimban-16-carboxylic acid, 16,17-didehydro-19-methyl-, 2-(ethoxycarbonyl)hydrazide, monohydrochloride, (19-alpha,20-alpha)- Tetrahydroalstonique acide N-(ethoxycarbonyl)hydrazide monochlorhydrate [French]