an 8-methoxyfurocoumarin + S-adenosyl-L-homocysteine + H(+) => an 8-hydroxyfurocoumarin + S-adenosyl-L-methionine
an 8-methoxyfurocoumarin + s-adenosyl-l-homocysteine + h(+) => an 8-hydroxyfurocoumarin + s-adenosyl-l-methionine
an 8-methoxyfurocoumarin + S-adenosyl-L-homocysteine + H(+) => an 8-hydroxyfurocoumarin + S-adenosyl-L-methionine
an 8-methoxyfurocoumarin + s-adenosyl-l-homocysteine + h(+) => an 8-hydroxyfurocoumarin + s-adenosyl-l-methionine