Figure 1
Chemical diagrams of (a) the s-cis conformer of astaxanthin diacetate, s-cis-(1); (b) the s-trans conformer of astaxanthin diacetate, s-trans-(1); (c) (3S,3′S)-7,8-didehydroastaxanthin (2); (d) (3S,3′S)-7,8,7′,8′-tetradehydroastaxanthin (3). |