You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[(2-bromoacetyl)amino]-3-methylbutanoic acid;2-[1-(2-hydroxyethyl)-2,6-dioxopiperidin-3-yl]isoindole-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H26BrN3O8
assistant