You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4-amino-3-nitrophenyl)-(4-methyl-2-pyrrolidin-1-yl-1,3-thiazol-5-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H16N4O3S
assistant