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2. PREPARATION AND CHEMISTRY OF Δ8-HEXAHYDRO-1,4,8-PYRIMIDAZOLE, Δ9-1,5,9-TRIAZABICYCLO(4.4.0)DECENE, AND Δ9-1,4,9-TRIAZABICYGLO(5.3.0)DECENE
3. Synthese symmetrisch substituierter bicyclischer Guanidine
4. The synthesis and properties of a series of strong but hindered organic bases