[{"from": "human", "value": "What can you tell me about this molecule? [C][C][O][C][=Branch1][C][=O][C@H1][Ring1][=Branch1][NH3+1]"}, {"from": "gpt", "value": "The molecule is an ammonium ion resulting from the protonation of the amino group of L-homoserine lactone. The major species at pH 7.3. It is a conjugate acid of a L-homoserine lactone."}]