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 1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-4-benzyl-N-[(4-cyanophenyl)methyl]piperidine-4-carboxamide .
user
C31H32N6O3
assistant