2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-6,8-bis(3-methyl-2-butenyl)-4H-1-benzopyran-4-one的熔点是多少?

2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-6,8-bis(3-methyl-2-butenyl)-4H-1-benzopyran-4-one的熔点是多少?
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