Figure 7
Overlay of the central part of the polyene chains of (3S,3′S)-7,8-didehydroastaxanthin (2) (dashed) and (3S,3′S)-7,8,7′,8′-tetradehydroastaxanthin (3) [excluding the lower-occupancy component disordered atoms of (2)] showing the quite different position of the end rings, and that they are s-cis and s-trans, respectively. |