1. Ultrafast
X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. The
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. Department
of Chemistry, University of California, Berkeley, California 94720, United States
5. Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
6. Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Linac
Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
8. Department
of Physics, University of California, Berkeley, California 94720, United States
9. SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
10. European XFEL GmbH, 22761 Hamburg, Germany
11. Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
12. Physics
Department, University of Hamburg and Max-Planck Institute for Structure and Dynamics of Matter, 22761 Hamburg, Germany