3-Cyano-1,2-dihydro-4-methoxy-2-oxopyridine1,2-Dihydro-4-methoxy-2-oxopyridine-3-carbonitrile4-Methoxy-2-oxo-1,2-dihydro-3-pyridinecarbonitrile3-Cyano-2-hydroxy-4-methoxypyridine1,2-Dihydro-4-methoxy-2-oxonicotinonitrileN-Demethyl Ricinine N-Demethylricinine1,2-Dihydro-4-methoxy-2-oxo-3-pyridinecarbonitrile4-Methoxy-2-oxo-1,2-dihydropyridine-3-carbonitrile