You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4-cyclopropyl-5,6,8,9-tetrahydropyrimido[4,5-d]azepin-7-yl)-(3-methoxy-1,2-oxazol-5-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C16H18N4O3
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