You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[(5-amino-6-oxopyrimidin-3-ium-1-yl)methyl]-4-(2-cyclopropylethynyl)-4-(trifluoromethyl)-1,3-dihydroquinazolin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H17F3N5O2+
assistant