(S)-norreticuline + S-adenosyl-L-methionine = (S)-norcodamine + S-adenosyl-L-homocysteine + H(+)
(s)-norreticuline + s-adenosyl-l-methionine = (s)-norcodamine + s-adenosyl-l-homocysteine + h(+)
(S)-norreticuline + S-adenosyl-L-methionine = (S)-norcodamine + S-adenosyl-L-homocysteine + H(+)
(s)-norreticuline + s-adenosyl-l-methionine = (s)-norcodamine + s-adenosyl-l-homocysteine + h(+)