Using COC(=O)c1ccc(N2CCC3(CCN(Cc4ccccc4)C3)C2)nc1 to produce COC(=O)c1ccc(N2CCC3(CCNC3)C2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.