7,4'-O-dimethylquercetin + S-adenosyl-L-homocysteine + H(+) => rhamnetin + S-adenosyl-L-methionine
7,4'-o-dimethylquercetin + s-adenosyl-l-homocysteine + h(+) => rhamnetin + s-adenosyl-l-methionine
7,4'-O-dimethylquercetin + S-adenosyl-L-homocysteine + H(+) => rhamnetin + S-adenosyl-L-methionine
7,4'-o-dimethylquercetin + s-adenosyl-l-homocysteine + h(+) => rhamnetin + s-adenosyl-l-methionine