Abstract A series of differently substituted 2, 4-diaryl-3-azabicyclo [3.3. 1] nonan-9-one oximes have been synthesized and their 1 H and 13 C NMR chemical shifts have been unambiguously assigned using H, H-COSY, NOESY, HSQC, and HMBC spectral data. On the basis of the NMR studies, irrespective of the nature and position of the substituents, all reported compounds exist in twin-chair conformation with equatorial disposition of the ...