[{"from": "human", "value": "Provide a description of this molecule. [C][N][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a benzyltetrahydroisoquinoline having the benzyl group at the 1-position and an N-methyl substituent. It is a conjugate base of a 1-benzyl-2-methyl-1,2,3,4-tetrahydroisoquinolinium."}]