Using O=CC(Br)C=O, CC(C)(C)OC(=O)NNC1CCC2(CCC(=O)N2)CC1 to produce O=C1CCC2(CCC(n3cc(Br)cn3)CC2)N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.