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