描述:
(2S,4R,5R,8R,9S,10S,11R,12R)-5-ethyl-9-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-11-[(2S,3R,4S,6R)-3-hydroxy-6-methyl-4-(methylamino)oxan-2-yl]oxy-4-methoxy-2,4,8,10,12,14-hexamethyl-6,15-dioxabicyclo[10.2.1]pentadec-1(14)-ene-3,7-dione 以50的产率得到(1S,2R,3S,4S,5R,8R,9R,11S)-8-乙基-4-[(2R,4R,5S,6S)-5-羟基-4-甲氧基-4,6-二甲基四氢吡喃-2-基]氧基-2-[(2S,3R,4S,6R)-3-羟基-6-甲基-4-(甲基-丙-2-基氨基)四氢吡喃-2-基]氧基-9-甲氧基-1,3,5,9,11,13-六甲基-7,15-二氧杂双环[10.2.1]十五碳-12-烯-6,10-二酮