label: 4-methylnorajmaline + S-adenosyl-L-methionine => 4-methylajmaline + S-adenosyl-L-homocysteine + H(+)
label_lc: 4-methylnorajmaline + s-adenosyl-l-methionine => 4-methylajmaline + s-adenosyl-l-homocysteine + h(+)