Using COc1ccc(CCN2CC(C(=O)c3ccc(-n4ccnc4)cc3)C2)cc1OC to produce COc1ccc(CCN2CC(Cc3ccc(-n4ccnc4)cc3)C2)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.