You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-phenyl-3-[[2-(trifluoromethyl)quinazolin-4-yl]sulfanylmethyl]-1,2,4-oxadiazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H11F3N4OS
assistant