You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1aR)-N-[(3R)-7-(3,8-diazabicyclo[3.2.1]octan-3-yl)-5,8-difluoro-3,4-dihydro-2H-chromen-3-yl]-1a,2,3,7b-tetrahydro-1H-cyclopropa[c][1,8]naphthyridine-6-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C25H27F2N5O2
assistant