You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-1-N-(5-phthalazin-5-yl-1,3,4-thiadiazol-2-yl)-3-[4-(trifluoromethyl)phenyl]propane-1,2-diamine ?
user
C20H17F3N6S
assistant