label: (R)-noradrenaline + S-adenosyl-L-methionine => (R)-normetanephrine + S-adenosyl-L-homocysteine + H(+)
label_lc: (r)-noradrenaline + s-adenosyl-l-methionine => (r)-normetanephrine + s-adenosyl-l-homocysteine + h(+)