1. Department of Chemistry; Texas A & M University; Corner of Ross and Spence Streets College Station TX 77843 USA
2. Department of Plant Pathology and Microbiology, Institute for Plant Genomics; Office of the Taxes State Chemist; Department of Veterinary Pathobiology; College Station TX 77843 USA
3. Fujian Institute of Research on the Structure of Matter; Chinese Academy of Science, Fuzhou; Fujian 350002 P.R. China