Using COc1ccc2nccc(C(O)CN3CCOC(CN)C3)c2c1, O=Cc1ccc2c(c1)OCO2 to produce COc1ccc2nccc(C(O)CN3CCOC(CNCc4ccc5c(c4)OCO5)C3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.