Using CCOP(OCC)OCC, O=C1CC2(CCCC2)CC(=O)N1CCCCN1CCN(c2ncccn2)CC1 to produce O=C1CC2(CCCC2)C(O)C(=O)N1CCCCN1CCN(c2ncccn2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.