You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3Z,6Z)-3-[(2-chlorophenyl)methylidene]-6-[(5-propyl-1,3-oxazol-4-yl)methylidene]piperazine-2,5-dione .
user
C18H16ClN3O3
assistant