The past decade has seen the reappearance of natural products as a valuable source of potent therapeutics. Here, experts on bioactive natural products cover the full spectrum of clinically relevant enzymes that are known to be targeted by natural products. Key enzymes include acetylcholine esterase, angiotensin-I-converting enzyme, cyclooxygenase, dihydrofolate reductase, phospholipase A2, respiratory complexes, and many more. By connecting the diversity of medicinal natural product sources with their potential clinical applications, this volume serves as a companion for the medicinal chemist looking for innovative small molecule compounds as well as for pharmacologist interested in the clinical effects and mode of action of herbal and traditional medicines.