You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-[(5-phenyl-1,3,4-oxadiazol-2-yl)amino]ethyl] 4-acetyl-3,5-dimethyl-1H-pyrrole-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H18N4O5
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