Using CN1CCC(CCCN(C(=O)OC(C)(C)C)C(=NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C)CC1 to produce CN1CCC(CCCNC(=N)N)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.