a 5-methoxyfurocoumarin + S-adenosyl-L-homocysteine + H(+) => a 5-hydroxyfurocoumarin + S-adenosyl-L-methionine
a 5-methoxyfurocoumarin + s-adenosyl-l-homocysteine + h(+) => a 5-hydroxyfurocoumarin + s-adenosyl-l-methionine
a 5-methoxyfurocoumarin + S-adenosyl-L-homocysteine + H(+) => a 5-hydroxyfurocoumarin + S-adenosyl-L-methionine
a 5-methoxyfurocoumarin + s-adenosyl-l-homocysteine + h(+) => a 5-hydroxyfurocoumarin + s-adenosyl-l-methionine