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- [7] FUSED PYRIMIDINES - SYNTHESIS OF PYRAZOLO[3,4-E][1,3,4]THIADIAZOLO[3,2-A]PYRIMIDINE AND PYRAZOLO[4',3'-5,6]PYRIMIDO[2,1-B]BENZOTHIAZOLE DERIVATIVES GAZZETTA CHIMICA ITALIANA, 1991, 121 (03): : 113 - 115
- [9] Synthesis of pyrazolo[3',4':5,6]pyrido[2,3-d]pyrimidines INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY, 1996, 35 (11): : 1208 - 1210