You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N,N-dimethyl-5-[3-(1-methylpiperidin-2-yl)propanoyl]-6,7-dihydro-4H-[1,2]oxazolo[4,5-c]pyridine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C18H28N4O3
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