Using COC(=O)CCc1cccc(CN)c1, O=Cc1ccc2c(c1)OCO2 to produce COC(=O)CCc1cccc(CNCc2ccc3c(c2)OCO3)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.