[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an ammonium ion resulting from the protonation of the nitrogen of the dimethylaminoethyl substituent of diltiazem. The major species at pH 7.3. It has a role as a histamine agonist, a calcium channel blocker and a vasodilator agent. It is a conjugate acid of a diltiazem. It is an enantiomer of an ent-diltiazem(1+)."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C@@H1][C@@H1][Branch2][Ring1][Branch2][S][C][=C][C][=C][C][=C][Ring1][=Branch1][N][Branch1][Branch1][C][Ring1][O][=O][C][C][NH1+1][Branch1][C][C][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C]"}]