... Please enable JavaScript to use all the features on this page. Tetrahedron: Asymmetry. Volume 16, Issue 15, 1 August 2005, Pages 2521–2524. Cover image Cover image. ... (1R,5S)-N- Carbobenzyloxy-3-oxa-6-azabicyclo[3.3.0]octan-2-one. C 14 H 15 NO 4. ...