You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[3-[1-[N-(7,7-dimethyl-2-oxabicyclo[3.2.0]heptan-6-yl)-N'-methylcarbamimidoyl]piperidin-4-yl]oxypropyl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H42N4O4
assistant