You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl 4-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]iminopiperidine-1-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C16H28N2O4
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