label: gramine + S-adenosyl-L-homocysteine + H(+) => (1H-indol-3-yl)-N-methylmethanamine + S-adenosyl-L-methionine
label_lc: gramine + s-adenosyl-l-homocysteine + h(+) => (1h-indol-3-yl)-n-methylmethanamine + s-adenosyl-l-methionine