You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4-chlorophenyl)-[4-[(5-naphthalen-1-yl-1,2,4-oxadiazol-3-yl)methyl]piperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H21ClN4O2
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