You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule has Pleasant. Polymerizes when exposed to heat. peroxides or other initiators may cause polymerization. When heated to decomposition it emits acrid smoke and irritating fumes.
user
C=CC(=O)OCC(CC)CCCC
assistant