877621-21-1 (2R,3R,4S,5R,6S)-2-(乙酰氧基甲基)-6-((5,7-二羟基-2-(4-羟基苯基)-4-氧代-4H-色烯-3-基)氧基)四氢-2H-吡喃-3,4,5-三基三乙酸酯

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