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Computed ground-state structure of the DsRed chromophore 2e, shown as a stereo pair for viewing with uncrossed eyes. Symbols for C, H, N, and O are explained in the Inset. Relevant bond lengths are given in angstroms. Starred and unstarred atoms, respectively, indicate where maxima and nodes of the highest occupied molecular orbital should be located according to basic molecular orbital theory (15), in agreement with the far more detailed calculations presented in Fig. 7.
