(3R,4R,5S,6S)-2-甲基-6-[(9S,10R,13R,14S,17R)-4,4,9,13,14-五甲基-3-[(2R,3R,4S,5S,6R)-3,4,5-三羟基-6-(羟基甲基)四氢吡喃-2-基]氧基-2,3,7,8,10,11,12,15,16,17-十氢-1H-环戊二烯并[a]菲-17-基]庚烷-2,3,4,5-四醇
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