You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2,5-dimethylthiophen-3-yl)-4-[4-(4-methyl-1,3-thiazol-2-yl)-1,4-diazepan-1-yl]butane-1,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H25N3O2S2
assistant