This book by Nazma et al., discusses the chemical constituents and biological activities of a unique medicinal plant, Dillenia indica growing in Bangladesh. This book will serve as a guide to the readers and scientist engaged in studies of medicinal plants of Bangladesh. Hopefully many important novel findings will come out from such studies which will benefit for the mankind. The method describes, herein, will also provide practical information about how to conduct phytochemical and biological studies of plants, including those known to have traditional medicinal values. The isolated chemical constituents, though not new, is an example of step by step isolation and structural characterization of the secondary plant metabolite from D. indica. It is hoped that this book would be very useful to the students of Pharmaceutical sciences, Chemistry, Biochemistry, Botany and Traditional system of medicine.This book has six chapters, introduction, materials and methods, results and discussion, Microbiological investigation, cytotoxicity and antioxidant. Finally all the results have been summarized in the conclusion section. The references have been listed in the final chapter.