You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3aR,7aS)-1-pyrimidin-2-yl-2,3,3a,4,5,6,7,7a-octahydroindol-2-yl]-[4-(6-fluoro-1H-indol-3-yl)-3,6-dihydro-2H-pyridin-1-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H28FN5O
assistant