You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: When heated to decomposition it emits acrid smoke and irritating fumes. Methyl methacrylate, and in general the methacrylic esters, polymerize much less readily than the corresponding ordinary acrylates. nonetheless, they are stabilized by adding hydroquinone or pyrogallol, particularly in the presence of metallic copper. methacrylates/
user
C=C(C)C(=O)OCCC
assistant