Using CCOC(=O)c1ccc(N2CCN(Cc3c[nH]c4ncccc34)CC2)cc1 to produce O=C(O)c1ccc(N2CCN(Cc3c[nH]c4ncccc34)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.