Federal prosecutors preparing for Barry Bonds?s perjury trial are said to have evidence that links Bonds to the use of performance-enhancing drugs other than the ?cream? and the ?clear,? the designer substances that have become synonymous with the Bonds case. A person who has reviewed the evidence said that the authorities detected anabolic steroids in urine samples linked to Bonds that they gathered in connection with their investigation. The person spoke on the condition of anonymity. The evidence could be significant because questions have been raised about whether the ?clear,? which like the ?cream? was created to avoid detection in drug tests, was technically a steroid under federal law when Bonds testified before a federal grand jury in November 2003. It was that testimony, in which Bonds denied knowingly using performance-enhancing drugs, that led to his indictment on perjury charges in 2007. A trial on those charges is set to begin March 2. When Bonds testified, he said he took the ?cream? and the ?clear? but did not believe they were performance-enhancing drugs.