Searching for drugs from natural resources in developing countries used to be much the same as old style prospecting for minerals and oils. It can be an engine for such conservation and sustainable economic development in non-industrialized countries that are strapped for cash but rich in natural resources. Bangladesh is a land of numerous medicinal plants. About thousand out of estimated five thousands species in Bangladesh are regarded as having medicinal properties. People of Bangladesh regard traditional medical practice as an integral part of their culture. But unfortunately most parts of its medicinal plants are not scientifically evaluated to explore certain medicinal properties. Although a large number of plants included in Euphorbiaceae family have been investigated all over the world, Euphorbiaceae plants investigated in Bangladesh have to show to have a wide range of secondary metabolites including thrombolysis compounds. This book reveals the attempt taken to study the chemical constituents and thrombolytic activities of Jatropha gossypiifolia member of the Euphorbiaceae family, growing in Bangladesh.