You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aR,4S,6aS)-2-(5-tert-butyl-1H-pyrazole-3-carbonyl)spiro[1,3,3a,5,6,6a-hexahydrocyclopenta[c]pyrrole-4,2'-1,3-dihydroquinazoline]-4'-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N5O2
assistant