label: (RS)-1-benzyl-1,2,3,4-tetrahydroisoquinoline + S-adenosyl-L-methionine <=> N-methyl-(RS)-1-benzyl-1,2,3,4-tetrahydroisoquinoline + S-adenosyl-L-homocysteine + H(+)
label_lc: (rs)-1-benzyl-1,2,3,4-tetrahydroisoquinoline + s-adenosyl-l-methionine <=> n-methyl-(rs)-1-benzyl-1,2,3,4-tetrahydroisoquinoline + s-adenosyl-l-homocysteine + h(+)