Simulated ECD and VCD spectra are available in spreadsheet form (.xlsx) for Figures 3, 6, 7, 9, and 10. A selection of measured crystal structures bearing the intermolecular bifurcated hydrogen-bond motif revealed in Figure 4b is available as a multistructure CIF file. The UV鈥搗is spectra of brevianamide A and B. This material is available free of charge via the Internet at
http://pubs.acs.org.