You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[6-(4-chlorophenyl)-8-methylimidazo[1,2-a]pyridin-3-yl]-3-phenyl-1,2,4-oxadiazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H15ClN4O
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