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