Using COc1ccc2nc(COC(=O)c3ccccc3)nc(NCc3ccc4c(c3)OCO4)c2c1 to produce COc1ccc2nc(CO)nc(NCc3ccc4c(c3)OCO4)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.