Using CCN(CCCN(CCCCCCCN(CCCN(CC)C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)C(=O)OC(C)(C)C to produce CCNCCCNCCCCCCCNCCCNCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.