You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: When heated to decomposition it emits acrid smoke and irritating vapors.
user
O=c1oc2c(O)c(O)cc3c(=O)oc4c(O)c(O)cc1c4c23
assistant