You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule has Odorless. Hazardous decomposition products formed under fire conditions - carbon oxides. The molecule has Persistent bitter after-taste. Please represent the molecule in SMILES.
user
CC12C=CC(=O)C=C1CCC1C2C(=O)CC2(C)C1CCC2(O)C(=O)CO
assistant