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- [27] SYNTHESIS OF 4-(ACYLACETYL)-1-PHENYL-2-PYRAZOLIN-5-ONES FROM 3-ACYL-2H-PYRAN-2,4(3H)-DIONES - THEIR SYNTHETIC APPLICATIONS TO FUNCTIONALIZED 4-OXOPYRANO[2,3-C]PYRAZOLE DERIVATIVES JOURNAL OF ORGANIC CHEMISTRY, 1983, 48 (22): : 4078 - 4082