You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[6-(4-fluorophenyl)-5-methylpyrrolo[2,3-b]pyrazin-2-yl]-[3-[[2-(trifluoromethyl)pyridin-3-yl]oxymethyl]piperidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23F4N5O2
assistant