Natural product to modern discovery of their active ingredients and eventually to the development of new drugs. A large number of currently prescribed drugs have been either directly derived from or inspired by natural products. A few representative examples are listed below. Some of the oldest natural product based drugs are analgesics. The bark of the willow tree has been known from antiquity to have pain relieving properties. This is due to presence of the natural product salicin which in turn may be hydrolyzed into salicylic acid. A synthetic derivative acetylsalicylic acid better known as aspirin is a widely used pain reliever.
Willow Rosenberg Willow is capable of. When Willow eventually exhibits what power she has, it briefly frightens Kennedy. Willow worries about becoming sexually intimate with Kennedy, unsure of what may transpire if she loses control of herself. In season 7 episode 20, "Touched", in which practically all the main cast has sex (two by two) Willow and Kennedy take part in the first lesbian sex scene on primetime television. In "Season Eight", Kennedy and Willow are still romantically involved, but separated during Willow's self-exploration. Unlike her relationship with Tara, Willow is able to hold a separate identity while with Kennedy. When she