You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-(5,7-dimethyl-2-phenyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-(2-fluorophenyl)acetamide .
user
C21H18FN5O
assistant