You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[7-but-2-ynyl-3-methyl-1-[(5-nitronaphthalen-1-yl)methyl]-2,6-dioxopurin-8-yl]piperidin-3-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H35N7O6
assistant