2.1.1.83 S-adenosyl-L-methionine + 3',4',5-trihydroxy-3,7-dimethoxyflavone trivial name 3,7-dimethylquercetin, enzyme does not act on flavones, dihydroflavonols or their glucosides Chrysosplenium americanum S-adenosyl-L-homocysteine + 3',5-dihydroxy-3,4',7-trimethoxyflavone trivial name 3,7,4'-trimethylquercetin ? 319975 2.1.1.83 S-adenosyl-L-methionine + 3',4',5-trihydroxy-3,7-dimethoxyflavone trivial name 3,7-dimethylquercetin, enzyme does not act on flavones, dihydroflavonols or their glucosides, involved with EC 2.1.1.76 and 2.1.1.82 in the methylation of quercitin to 3,7,4'-trimethylquercitin Chrysosplenium americanum S-adenosyl-L-homocysteine + 3',5-dihydroxy-3,4',7-trimethoxyflavone trivial name 3,7,4'-trimethylquercetin ? 319975 2.1.1.83 S-adenosyl-L-methionine + 3,7-dimethylquercetagetin - Chrysosplenium americanum S-adenosyl-L-homocysteine + 3,7,4'-trimethylquercetagetin + H+ - ? 319976