Tripathi, P.; Asthana, R.; Ojha, G. Synthesis and Fungicidal Activities of Some 4-Aryl-1-Aroyl-5-Cyano-3-Methyl Pyrazolo [4,5-b], 3,4,7-Trihydropyridin-6-Ones Derivatives. ajc 2010, 18, 3120-3122.