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4-amino-5-methylpyridin-2-yl 4-(4-cyano-2-methoxyphenyl)-5-hydroxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxylate
Fenelidone impurity 1
AHD(1-Aminohydantoin hydrochloride)
