Pharmacognosy-Introduction

Introduction

1 Pharmacognosy—A Brief History

2 Importance of Natural Drug Substances

2.1 Serve as Extremely Useful Natural Drugs

2.2 Provide Basic Compounds Affording Less Toxic and More Effective Drug Molecules

2.3 Exploration of Biological–Active–Prototypes towardsNewer and Better Synthetic Drugs

2.4 Modificaton of Inactive Natural Products by Suitable Biological/Chemical Means into Potent Drugs

3 Natural Drugs Substances: Cultivation and Production

3.1 Plant Products

3.2 Cell-Culture Techniques

3.3 Microbial Metabolites

3.4 Animal Derivatives

4 Phytochemistry

4.1 Constituents

4.1.1Active Constituents

4.1.2Inert Constituents

4.1.3 DrugBiosynthesis (or Biogenesis)