Using CC(=O)Nc1c(I)c(C(=O)NCC(O)CO)c(I)c(C(=O)NCC(O)CO)c1I, OCC1CO1 to produce CC(=O)N(CC(O)CO)c1c(I)c(C(=O)NCC(O)CO)c(I)c(C(=O)NCC(O)CO)c1I, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.