Ma Yudao, Song Chun, Ma Changqing, Sun Zhijun, Chai Qiang, Andrus Merritt B
Chemistry College of Shandong University, Shanda South Road No. 27, Jinan, Shandong, 250 100, P. R. China.
Angew Chem Int Ed Engl. 2003;42(47):5871-4. doi: 10.1002/anie.200352679.