Task: Please generate a SMILES based on the text description below.
Description: The molecule is that isomer of butenoic acid having the double bond at position C-3. It is a conjugate acid of a but-3-enoate.
Result: C=CCC(=O)O
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
but-3-enoic acid
The molecule is that isomer of butenoic acid having the double bond at position C-3. It is a conjugate acid of a but-3-enoate.