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What is the molecular formula of the molecule identified by 3-[(3S,4R,6S)-4,5-dihydroxy-6-[7-hydroxy-2-(4-hydroxyphenyl)-3-[(2S,5S)-3,4,5-trihydroxy-6-[[(E)-3-(4-hydroxyphenyl)prop-2-enoyl]oxymethyl]oxan-2-yl]oxychromenylium-5-yl]oxy-2-(hydroxymethyl)oxan-3-yl]oxy-3-oxopropanoic acid ?
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C39H39O20+
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