You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance methyl (3S,6S)-1-[5-(3,4-dichlorophenyl)quinazolin-4-yl]-6-methylpiperidine-3-carboxylate .
user
C22H21Cl2N3O2
assistant