You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[2-(2,8-diazaspiro[4.5]decan-8-yl)-2-oxoethyl]-3a-methyl-2,3-dihydropyrrolo[1,2-a]quinazoline-1,5-dione;hydrochloride .
user
C22H29ClN4O3
assistant