2 3 4 5 7 pentahydroxyflavone July 8, 2019 16 32 64 128 (+)-3 3' 4' 5 7-pentahydroxyflavan 2 3 4 5 6-pentahydroxyhexanal 2 hydroxy pentanoic acid 2 3-dihydro-3 5-dihydroxy-6-methyl-4h-pyran-4-one
