You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
acetonitrile;2-bromo-5-(2-fluoro-1,1-dimethoxyethyl)thiophene;1-(5-bromothiophen-2-yl)-2-fluoroethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H17Br2F2NO3S2
assistant