Using C=C(CO)COC(=O)NCCCCCCCCCCCCCCCCCC, O=C=NCCCCBr to produce C=C(COC(=O)NCCCCBr)COC(=O)NCCCCCCCCCCCCCCCCCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.