Using O, CC(=O)c1ccc(-c2ccc3c(c2)CCN(CC(=O)N2CCN(C4CCC4)CC2)C3)cc1 to produce CC(O)c1ccc2c(c1)CCN(CC(=O)N1CCN(C3CCC3)CC1)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.