You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-(3-nitrophenyl)-7-pyridin-4-yl-2,3-dihydropyrazolo[5,1-b][1,3]thiazole by IUPAC nomenclature, provide its molecular formula.
user
C16H12N4O2S
assistant