norbelladine + S-adenosyl-L-methionine = 4'-O-methylnorbelladine + S-adenosyl-L-homocysteine + H(+)
norbelladine + s-adenosyl-l-methionine = 4'-o-methylnorbelladine + s-adenosyl-l-homocysteine + h(+)
norbelladine + S-adenosyl-L-methionine = 4'-O-methylnorbelladine + S-adenosyl-L-homocysteine + H(+)
norbelladine + s-adenosyl-l-methionine = 4'-o-methylnorbelladine + s-adenosyl-l-homocysteine + h(+)