Using COC(=O)c1cc(Nc2ccc(OC)cc2)c(Nc2ccc(OC)cc2)cc1C(=O)OC, N to produce COc1ccc(Nc2cc3c(cc2Nc2ccc(OC)cc2)C(=O)NC3=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.