You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(4-methyl-3,5-dioxopiperazin-1-yl)benzoic acid is the IUPAC name of a molecule. Please give its SMILES representation.
user
CN1C(=O)CN(C2=CC=C(C(=O)O)C=C2)CC1=O
assistant