(2R)-5-羟基-1,2-二甲基-4-[(E,4S,6R,8S,9S,10S,11R,12R,13R,14S,15R,17S,18S,19R,20S,21R,23R,25S,27S,28R,29S,30S,31R)-8,9,11,13,15,17,19,21 ,23,25,27,28,29,30,31-十五羟基-2,4,6,10,12,14,18,20-八甲基 -32-[(2R,3R,4S,5S,6S)-3,4,5,6-四羟基 (2R)-5-hydroxy-1,2-dimethyl-4-[(E,4S,6R,8S,9S,10S,11R,12R,13R,14S,15R,17S,18S,19R,20S,21R,23R,25S,27S,28R,29S,30S,31R)-8,9,11,13,15,17,19,21,23,25,27,28,29,30,31-pentadecahydroxy-2,4,6,10,12,14,18,20-octamethyl-32-[(2R,3R,4S,5S,6S)-3,4,5,6-tetrahydroxy