Tree from the cinchona tree ("Cinchona") and was for a long time the remedy of choice for the treatment of malaria. Aspirin was synthesised to replace the sodium salicylate derived from the bark of willow trees ("Salix") which had unpleasant side effects. The anti-cancer drug Paclitaxel is derived from taxol, a substance found in the bark of the Pacific yew ("Taxus brevifolia"). Other tree based drugs come from the paw-paw ("Carica papaya"), the cassia ("Cassia spp."), the cocoa tree ("Theobroma cacao"), the tree of life ("Camptotheca acuminata") and the downy birch ("Betula pubescens"). The papery bark of the white birch tree
History of aspirin to allow sale of these holdings, the government auctioned off the Rensselaer plant and all Bayer's American patents and trademarks, including even the Bayer brand name and the Bayer cross logo. It was bought by a patent medicine company, Sterling Products, Inc.. The rights to Bayer Aspirin and the U.S. rights to the Bayer name and trademarks were sold back to Bayer AG in 1994 for US$1 billion. With the coming of the deadly Spanish flu pandemic in 1918, aspirin—by whatever name—secured a reputation as one of the most powerful and effective drugs in the pharmacopeia of the time. Its