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What is the molecular formula of the compound with this IUPAC name [(2R,3S,4S,5R,6S)-6-[(2S,3R,4S,5R,6R)-2-[2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4-oxochromen-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl 3-(4-hydroxy-3,5-dimethoxyphenyl)prop-2-enoate ?
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C38H40O21
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