label: (S)-bulbocapnine + S-adenosyl-L-methionine = (S)-N-methylbulbocapnine + S-adenosyl-L-homocysteine + H(+)
label_lc: (s)-bulbocapnine + s-adenosyl-l-methionine = (s)-n-methylbulbocapnine + s-adenosyl-l-homocysteine + h(+)