You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[6-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)pyrimidin-4-yl]-pyrrolidin-1-ylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H22N4O3
assistant