You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-diethylethanamine;1-[1-[2-[(6R,9S)-6-(2,3-difluorophenyl)-3-(2,2,2-trifluoroethyl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-9-yl]acetyl]piperidin-4-yl]imidazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H42F5N7O3
assistant