(-)-Dregamine 20-Epitabernemontanine 2299-26-5 AIDS-127710 AIDS127710 Dregamine Methyl 3-oxo-19,20-dihydrovobasan-17-oate NSC177392 Vobasan-17-oic acid, 19, 20-dihydro-3-oxo-, methyl ester, (20.alpha.)-