24163-58-4 4,4'-Didemethyl-18,18'-dideoxytoxiferine I Bisnor Bisnordihydro toxiferine Bisnordihydrotoxiferine Dihydronortoxiferine Dihydronortoxiferine I Nordihydrotoxiferine Nortoxiferine, dihydro- (6CI,8CI) Toxiferine I, 4,4'-didemethyl-18,18'-dideoxy-