You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[2-[(2R,6R)-2,6-dimethylpiperidin-1-yl]-2-oxoethyl]sulfanyl-3-(4-ethoxyphenyl)quinazolin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C25H29N3O3S
assistant