You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-(3-aminopiperidin-1-yl)-1-[(4,4-dimethyl-1,3-benzoxazin-2-yl)methyl]-7-ethyl-3-methylpurine-2,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H31N7O3
assistant