quercetin + S-adenosyl-L-methionine = rhamnetin + S-adenosyl-L-homocysteine + H(+)
quercetin + s-adenosyl-l-methionine = rhamnetin + s-adenosyl-l-homocysteine + h(+)
quercetin + S-adenosyl-L-methionine = rhamnetin + S-adenosyl-L-homocysteine + H(+)
quercetin + s-adenosyl-l-methionine = rhamnetin + s-adenosyl-l-homocysteine + h(+)