You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-[5-[(3S)-3-[(2S)-2-methylpyrrolidin-1-yl]pyrrolidin-1-yl]pyrazin-2-yl]-1-oxo-2,8-diazaspiro[4.5]decane-8-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H40N6O3
assistant