(+)-pisatin + S-adenosyl-L-homocysteine + H(+) => (+)-6a-hydroxymaackiain + S-adenosyl-L-methionine
(+)-pisatin + s-adenosyl-l-homocysteine + h(+) => (+)-6a-hydroxymaackiain + s-adenosyl-l-methionine
(+)-pisatin + S-adenosyl-L-homocysteine + H(+) => (+)-6a-hydroxymaackiain + S-adenosyl-L-methionine
(+)-pisatin + s-adenosyl-l-homocysteine + h(+) => (+)-6a-hydroxymaackiain + s-adenosyl-l-methionine