Studies on the mechanism in reactions that degradating specific natural products using acitive sites of natural enzyme are becoming a magic weapon for scientists in bio-pharmcetuical field to make targeted drugs cheaper, more efficient and lower side effect. Therefore, manually establishment of model complexes to mimic acitive sites and the mechanism of natural enzyme is becoimg a hot topic in biological inorganic chemistry filed. To mimic the active sites and substituent effects of HPPD, we have completed ...