Using NCC(O)c1ccc(O)cc1, CC(C)(C)OC(=O)N=C(NC(=O)OC(C)(C)C)n1cccn1 to produce CC(C)(C)OC(=O)N=C(NCC(O)c1ccc(O)cc1)NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.