8-hydroxyquercetin 8-O-methyltransferase; flavonol 8-O-methyltransferase; flavonol 8-methyltransferase; S-adenosyl-L-methionine:3,3',4',5,7,8-hexahydroxyflavone 8-O-methyltransferase; 8-hydroxyquercitin 8-O-methyltransferase [mis-spelt]