You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[5-acetyl-3-amino-6-methyl-4-(5-methylthiophen-2-yl)thieno[2,3-b]pyridine-2-carbonyl]-3-phenyloxadiazol-3-ium-5-olate is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H18N4O4S2
assistant