You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(3-cyclopropyl-5-piperidin-1-ylpyridin-2-yl)ethyl]-3-ethyl-6-fluoro-1H-indole-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H31FN4O
assistant