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