The present invention relates to {TAIL ~ the preparation} of {HEAD ~ pyridinone carboxylic acid aldehydes} such as 5 methoxy 6 4 oxo 1 1,4 dihydropyridine 3 carboxylic acid 
The present invention relates to { TAIL ~ the preparation } of { HEAD ~ pyridinone carboxylic acid aldehydes } such as 5 methoxy 6 4 oxo 1 1,4 dihydropyridine 3 carboxylic acid
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