Periyasamy Selvam1*, K. Babu1, R. Padamraj1, Leentje persoons2 and Erik de Clercq2
1Arulmigu Kalasalingam College of Pharmacy, Krishnankoil-626190.
2Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium.