I am writing to thank you again for the excellent work that Tyger did in synthesizing our anti-tumor compound. The material you supplied was of the highest quality, based both on the analytical data you supplied and on our own further testing. We used this preparation for extensive experiments in mice, where it showed impressive efficacy against the development of tumors and no hint of any toxicity. This work was recently published in the Proceedings of the National Academy of Sciences, U.S.A. I would not hesitate to recommend Tyger Scientific to other researchers who require custom chemical synthesis.