3-hydroxyanthranilate + S-adenosyl-L-methionine => 3-hydroxy-4-methylanthranilate + S-adenosyl-L-homocysteine + H(+)
3-hydroxyanthranilate + s-adenosyl-l-methionine => 3-hydroxy-4-methylanthranilate + s-adenosyl-l-homocysteine + h(+)