You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-bromo-5-methylthiophen-2-yl)-2-quinolin-8-ylethanone;1-(5-bromo-4-methylthiophen-2-yl)-2-quinolin-8-ylethanone;1-(4-methylthiophen-2-yl)-2-quinolin-8-ylethanone;1-(5-methylthiophen-2-yl)-2-quinolin-8-ylethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C64H50Br2N4O4S4
assistant