3 4' 5 7-tetrahydroxyflavone July 8, 2019 16 32 64 128 3′ 4′ 5 7-trihydroxy flavone Luteolin 3′ 4′ 5 7-tetrahydroxyflavone (+)-3 3' 4' 5 7-pentahydroxyflavan 2' 3 4' 5 7-pentahydroxyflavone 3 5 7-trihydroxy-2-(4-hydroxyphenyl)-4h-chromen-4-one 3 5 7-trihydroxy-2-phenyl-4h-chromen-4-one