(+)-N-isobutyroylbuxahyrcanine ((20S)-20-(dimethylamino)-3beta-(2'-methylpropanoyl)bux-9(11)-en-10alpha-ol)
(+)-n-isobutyroylbuxahyrcanine ((20s)-20-(dimethylamino)-3beta-(2'-methylpropanoyl)bux-9(11)-en-10alpha-ol)