You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: When heated to decomposition, emits highly toxic vapors. 2,4-d esters/ Please write the SMILES representation of it.
user
O=C(COc1ccc(Cl)cc1Cl)OCC=CCCl
assistant