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 6-chloro-4-(2-cyclopropylethynyl)-7-[[6-oxo-4-(trifluoromethyl)pyrimidin-1-yl]methyl]-4-(trifluoromethyl)-1,3-dihydroquinazolin-2-one .
user
C20H13ClF6N4O2
assistant