You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule has Pungent odor. Presence of mineral or lewis acids, or bases including amines, will catalyse violent polymerisation of this very reactive dimer, accompanied by gas evolution. sodium acetate is sufficiently basic to cause violent polymerization at 0.1% concn when added to diketene at 60 °c. When heated to decomposition it emits acrid smoke and fumes. Use the above information to create a molecule.
user
C=C1CC(=O)O1
assistant