You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-diethyl-2-[3-(3-methoxyphenyl)-4-oxospiro[6H-benzo[h]quinazoline-5,1'-cyclopentane]-2-yl]sulfanylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H33N3O3S
assistant