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 2,2,7-trifluoro-6-[7-oxo-5-(trifluoromethyl)imidazo[1,2-a]pyrimidin-8-yl]-4-prop-2-ynyl-1,4-benzoxazin-3-one .
user
C18H8F6N4O3
assistant