[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an ammonium ion resulting from the protonation of the nitrogen of the dimethylaminoethyl substituent of ent-diltiazem. The major species at pH 7.3. It has a role as a potassium channel blocker. It is a conjugate acid of an ent-diltiazem. It is an enantiomer of a 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]"}]