[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][N][Branch1][S][C][C][N][Ring1][=Branch1][C][C][S][=Branch1][C][=O][=Branch1][C][=O][O][C][C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a Good's buffer substance, pKa = 6.8 at 20 \u2103. It is a conjugate acid of a 2,2'-piperazine-1,4-diylbisethanesulfonate."}]