Page 1. Indian Journal of Chemistry Vol. 41B, March 2002, pp. 647-649 ... Page 2. 648 INDIAN 1. CHEM., SEC B, MARCH 2002 7 1 ... C,Jh.N40 2 requires C, 62.22; H, 5.18; N, 20.74 %. Acknowledgement One of the authors (5 A) thanks CSIR, New Delhi, India for financial support. ...