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- [29] SYNTHESIS OF NEW SUBSTITUTED 5,6-DIHYDROTETRAZOLO[1,5-C]QUINAZOLINES, TETRAZOLO[1,5-C]QUINAZOLINES, 5,6-DIHYDROPYRIMIDO[5,4-E]TETRAZOLO[1,5-C]PYRIMIDINES AND 5,6-DIHYDROTETRAZOLO[1,5-C]PYRIMIDINES CHEMIKER-ZEITUNG, 1988, 112 (04): : 135 - 140