label: 3',4',5'-trimethylmyricetin 3-O-methyltransferase activity
label_lc: 3',4',5'-trimethylmyricetin 3-o-methyltransferase activity
description: "Catalysis of the reaction: 3',4',5'-O-trimethylmyricetin + S-adenosyl-L-methionine = 3,3',4',5'-O-tetramethylmyricetin + S-adenosyl-L-homocysteine."