[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a Good's buffer substance, pKa = 6.15 at 20 \u2103. It is an organosulfonic acid and a MES. It is a conjugate acid of a 2-(N-morpholino)ethanesulfonate. It is a tautomer of a 2-(N-morpholiniumyl)ethanesulfonate."}, {"from": "gpt", "value": "[C][C][O][C][C][N][Ring1][=Branch1][C][C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]