Task: Please create a molecule SMILES based on the text description below.
Description: The molecule is a gamma-lactone that is oxolan-2-one substituted by an ethyl group at position 5. It has a role as a human blood serum metabolite.
Result: CCC1CCC(=O)O1
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
5-ethyloxolan-2-one
The molecule is a gamma-lactone that is oxolan-2-one substituted by an ethyl group at position 5. It has a role as a human blood serum metabolite.