kaempferol + S-adenosyl-L-methionine = 3-O-methylkaempferol + S-adenosyl-L-homocysteine + H(+)
kaempferol + s-adenosyl-l-methionine = 3-o-methylkaempferol + s-adenosyl-l-homocysteine + h(+)
kaempferol + S-adenosyl-L-methionine = 3-O-methylkaempferol + S-adenosyl-L-homocysteine + H(+)
kaempferol + s-adenosyl-l-methionine = 3-o-methylkaempferol + s-adenosyl-l-homocysteine + h(+)