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What is the molecular formula of the compound with this IUPAC name (2S,4R,5R,6S)-6-[(1R)-2-[(2R,4R,5R,6R)-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxan-2-yl]oxy-1-[(2S,3S,4S,5S,6R)-6-[(1S)-1,2-dihydroxyethyl]-3,4,5-trihydroxyoxan-2-yl]oxyethyl]-2,4,5-trihydroxyoxane-2-carboxylic acid ?
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C23H38O21
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