1. College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 P. R. China
2. Synthetic and Functional Biomolecules Center Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 P. R. China
3. Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences National Centre for Mass Spectrometry in Beijing CAS Key Laboratory of Analytical Chemistry for Living Biosystems Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
4. Peking-Tsinghua Center for Life Sciences Beijing 100871 P. R. China
5. Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China