Task: Please create a SMILES based on the description below.
Description: The molecule is a monocarboxylic acid anion that is the conjugate base of 4-carboxymethyl-3-methylbut-2-en-1,4-olide; major species at pH 7.3. It is a conjugate base of a 4-carboxymethyl-3-methylbut-2-en-1,4-olide.
Result: CC1=CC(=O)OC1CC(=O)[O-]
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
CC1=CC(=O)OC1CC(=O)[O-]
2-(3-methyl-5-oxo-2H-furan-2-yl)acetate
The molecule is a monocarboxylic acid anion that is the conjugate base of 4-carboxymethyl-3-methylbut-2-en-1,4-olide; major species at pH 7.3. It is a conjugate base of a 4-carboxymethyl-3-methylbut-2-en-1,4-olide.