You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[5-[[3-[[8-[2-(dimethylcarbamoyl)piperidin-1-yl]quinazolin-2-yl]amino]-2-methoxy-7,8-dihydro-5H-1,6-naphthyridin-6-yl]methyl]-2-[(6-methyl-2-oxo-1,5,7,8-tetrahydro-1,6-naphthyridin-3-yl)amino]pyrido[3,4-d]pyrimidin-8-yl]-N-methylmorpholine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C48H57N15O5
assistant