You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: Methyl methacrylate, and in general the methacrylic esters, polymerize much less readily than the corresponding ordinary acrylates. none the less, they are stabilized by adding hydroquinone or pyrogallol, particularly in the presence of metallic copper. methacrylates/ When heated to decomposition it emits acrid smoke and irritating fumes.
user
C=CCOC(=O)C(=C)C
assistant