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: When heated to decomposition it emits acrid smoke and fumes. The molecule has both a Tart taste; pure aq soln are slightly bitter & taste build up is slow and a Odorless.
user
O=C(O)CCC(=O)O
assistant