evidence: - Chemists have found that the seeds of the sweetgum fruit -- also called "gumballs" -- contain significant amounts of shikimic acid, the starting material used to produce the main antiviral agent in a much-heralded drug for fighting bird flu. The finding could help increase the global supply of the drug, which is now in short supply, they say. Their study will be presented March 29th in Atlanta at the national meeting of the American Chemical Society. [...] Chemists have found that the seeds of the sweetgum fruit contain significant amounts of shikimic acid, the starting material used to produce the main antiviral agent in a much-heralded drug for fighting bird flu. Their findings, which could help increase the global supply of the drug, were described today at the 231st national meeting of the American Chemical Society, the world’s largest scientific society. Shikimic acid is used to make a generic drug called oseltamivir — best known commercially as Tamiflu® — which is used to fight many types of flu viruses. Some health experts believe that this and similar antiviral drugs could help save lives by slowing the spread of the virus in the absence of a bird flu vaccine, which is still in development.