xanthotoxol + S-adenosyl-L-methionine = xanthotoxin + S-adenosyl-L-homocysteine + H(+)
xanthotoxol + s-adenosyl-l-methionine = xanthotoxin + s-adenosyl-l-homocysteine + h(+)
xanthotoxol + S-adenosyl-L-methionine = xanthotoxin + S-adenosyl-L-homocysteine + H(+)
xanthotoxol + s-adenosyl-l-methionine = xanthotoxin + s-adenosyl-l-homocysteine + h(+)