User: I'm searching for the SMILES of a molecule that can be described as:
The molecule is a member of the class of phosphonic acids that is phosphonic acid having a butyl group attached to the phosphorous atom.
Assistant: This is a molecule that fits this description: CCCCP(=O)(O)O
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#}
butylphosphonic acid
The molecule is a member of the class of phosphonic acids that is phosphonic acid having a butyl group attached to the phosphorous atom.