You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(4-chlorophenyl)methyl]-N-[(4,5-dimethyl-1,3-oxazol-2-yl)methyl]-N'-methyl-3-oxopiperazine-1-carboximidamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H24ClN5O2
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