1. Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
2. Department
of Biochemistry and Molecular Pharmacology, UMass Medical School, 364 Plantation Street, Worcester, Massachusetts 01605, United States
3. Program
in Chemical Biology, UMass Medical School, 364 Plantation Street, Worcester, Massachusetts 01605, United States