Using CC(C)(C)OC(=O)NCCCN(CCCCN)C(=O)OC(C)(C)C, CCOC(=O)CC(=O)[O-] to produce CCOC(=O)CC(=O)NCCCCN(CCCNC(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.