You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[4-chloro-2-(trifluoromethyl)phenyl]-2-(4-oxo-1-propan-2-yl-3,3a,5a,6,7,8,9,9a-octahydro-[1,2,4]triazolo[4,3-a]quinoxalin-5-yl)acetamide .
user
C21H25ClF3N5O2
assistant