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What is the molecular formula of the compound with this IUPAC name 3-hydroxy-2-[[2-(2-methoxyphenyl)-6-(3,4,5-trimethoxyphenyl)pyran-4-ylidene]methyl]-4-[[2-(2-methoxyphenyl)-6-(3,4,5-trimethoxyphenyl)pyrylium-4-yl]methylidene]cyclobut-2-en-1-one ?
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C48H43O12+
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