(2S,3S,4S,5R,6R)-2-[2-[(2Z,5Z,7Z,9R,10R,11Z)-10-羟基-3,7,9,11-四甲基十三碳-2,5,7,11-四烯基]-5,6-二甲氧基-3-甲基吡啶-4-基]氧基-6-甲基四氢吡喃-3,4,5-三醇
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