User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is a Good's buffer substance, pKa = 6.8 at 20 ℃. It is a conjugate acid of a 2,2'-piperazine-1,4-diylbisethanesulfonate.
Assistant: This is a molecule that fits this description: O=S(=O)(O)CCN1CCN(CCS(=O)(=O)O)CC1
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonicacid
The molecule is a Good's buffer substance, pKa = 6.8 at 20 ℃. It is a conjugate acid of a 2,2'-piperazine-1,4-diylbisethanesulfonate.