References
- Naz , S. 1995 . Phytochemical and Structural Studies on the Chemical Constituents of Buxus sempervirens and B. papillosa , 136 Pakistan : H. E. J. Research Institute of Chemistry, University of Karachi . Ph. D. Dissertation
- Cordell , G. A. 1981 . Introduction to Alkaloids; A Biogenetic Approach , New York : John Wiley and Sons .
- Durant , J. , Dellamonica , P. and Reboult , A. 1993 . PCT. Int. Appl. W09300, 916 (Chem. Abst. 118, 139823u)
- Atta-ur-Rahman . 1990 . Handbook of Natural Product Data; Diterpenoidal and Steroidal Alkaloids , Vol. 1 , 634 Amsterdam : Elsevier Science Publishers . “”, p
- Atta-ur-Rahman , Z. Iqbal , Choudhary , M. I. and Fatima , T. 1990 . Buxapapilinine- A novel alkaloid from the leaves of . Buxus papillosa, Heterocylces , 31 : 493 p
- Atta-ur-Rahman . 1989 . One- and Two-Dimensional NMR Spectroscopy , Amsterdam : Elsevier Science Publishers .
- Atta-ur-Rahman and Choudhary , M. I. 1996 . Solving Problems with NMR Spectroscopy , New York : Academic Press .
- Budzikiewicz , H. 1972 . “Steroids” in Biochemical Application of Mass Spectrometery , Edited by: Waller , Ed. G. R. 251 New York : Wiley-Interscience . p
- Atta-ur-Rahman and Choudhary , M. I. 1988 . “Structural Studies on New Steroidal Alkaloids of Buxus papillosa-Some Generalized Spectral Deductions” in “Studies in Natural Products Chemistry” . Edited by: Atta-ur-Rahman . Vol. 2 , 175 Amsterdam : Elsevier Science Publishers . Ed., p
- Altomare , A. , Burla , M. C. , Camalli , M. , Cascarano , M. , Giacovazzo , C. , Guagliardi , A. and Polidori , G. 1990 . J. Appl. Cryst. , SIR92: .(
- Beurskens , P. T. , Admiraal , G. , Beurskens , G. , Bosman , W. P. , de Gelder , R. , Israel , R. and Smith , J. M. M. 1994 . The DIRDIF-94 Program System, Technical Report of the Crystallography Laboratory , The Netherland : University of Nijmegen . DIRDIF94
- Cromer , D. T. and Waber , J. T. 1974 . International Tables for X-Ray Crystallography , Vol. IV , Brimingham, , England : The Kynoch Press . “”, Table 2.2A
- Ibers , J. A. and Hamilton , W. C. 1964 . Acta Crystallogr. , 17 : 781 p
- Creagh , D. C. and McAuley , W. J. 1992 . International Tables for Crystallography , Edited by: Wilson , A. J. C. Vol. C , 219 – 222 . Boston : Kluwer Academic Publishers . Table 4.2. 6.8
- Creagh , W. C. and Hubbell , J. H. 1992 . International Tables for Crystallography , Edited by: Wilson , A. J. C. Vol. C , 200 – 206 . Boston : Kluwer Academic Publishers . Table 4.2. 4.3
- 1985 and 1992 . Crystal Structure Analysis Package , Molecular Structure Corporation . teXsan