You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-(3,5-difluorophenyl)-N-[3-[2-(4-oxa-7-azoniatricyclo[3.2.0.02,7]heptan-7-yl)propanoylamino]-4-(trifluoromethoxy)phenyl]pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H22F5N4O4+
assistant