You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(4-chlorophenyl)-N-[3-(1-hydroxy-2-methylpropan-2-yl)-1,2-oxazol-5-yl]-5-oxopyrrolidine-2-carboxamide .
user
C18H20ClN3O4
assistant