(2S,3S,4S,5R,6R)-3,4,5-三羟基-6-[[(3S,5R,8R,9S,10S,13R,14S,17R)-17-[(2R)-5-羟基-5-氧代戊烷-2-基]-10,13-二甲基-2,3,4,5,6,7,8,9,11,12,14,15,16,17-十四氢-1H-环戊并[a]菲-3-基]氧基]四氢吡喃-2-羧酸
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