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 => 7,4'-o-dimethylquercetin + s-adenosyl-l-homocysteine + h(+)