You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-3-nitro-N-[5-phenyl-7-(trifluoromethyl)-[1,3]thiazolo[4,5-b]pyridin-2-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H13F3N4O3S
assistant