prov:value
| - A precursor solution of the pyridone having the desired substituents thereon is prepared in an appropriate solvent, such as a mixture of water, organic solvents, including lower alcohols such as ethanol, ethanol, isopropanol, and the like, water-miscible nonbasic organic solvents such as tetrahydrofuran, acetone, dimethoxyethane, N,N-dimethylformamide, N,N-dimethylacetamide, and the like, as well
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