You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 5-[(1-tert-butyl-4-methyl-7-oxopyrazolo[3,4-d]pyridazin-6-yl)methyl]furan-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C17H20N4O4
assistant