Fig. 7 in 1,3-Dioxepine and spiropyran derivatives of viomellein and other dimeric naphthopyranones from cultures of Aspergillus elegans KUFA0015 and their antibacterial activity

Fig. 7. Models of 6 representing the two lowest energy conformations of the central ring (groups G1, left, and G2, right) as well as the lowest energy transition state model TS for the conversion between G1 and G2. For correct 3D interpretation of these projections, consider the H-11 nuclei nearer to the observer and the methoxy groups farther from the observer.