You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 4-chloro-N-[1-(5-methyl-1,2,4-oxadiazol-3-yl)cyclohexyl]-3-(2-oxopyrrolidin-1-yl)benzamide ?
user
C20H23ClN4O3
assistant