1. Chemistry Research Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK.
2. OMass Technologies Ltd., Centre for Innovation and Enterprise, Begbroke Science Park, Woodstock Road, Oxford OX5 1PF, UK.
3. CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China.
4. School of Life Science and Technology, ShanghaiTech University, 99 Haike Road, Pudong, Shanghai 201203, China.
5. Departments of Chemistry and Biochemistry, University of Oxford, Oxford OX1 3QU, UK.