... CS Mahajanshclli, YB Shivakumar & MV Akki Department of Medicinal Chcmistry, Collcge of Pharmacy, JN Medical Collegc Campus, Belgaum 590 010, India. ... 394 INDIAN J. CHEM, SEC B, FEBRUARY 2004 ... Where a, - J J R - H' b R = CH 3; C, R = CI ; d, R = N02 Scheme I R ...