3 5 7 2 4 pentahydroxyflavone July 8, 2019 16 32 64 128 (+)-3 3' 4' 5 7-pentahydroxyflavan 5 7 3' 4' 5'-pentahydroxyflavone 3 4' 5 7-tetrahydroxyflavone 2′ 3 4′ 5 7-pentahydroxyflavone
