Astaxanthin dirhamnoside, a new astaxanthin derivative produced by a radio-tolerant bacterium, Sphingomonas astaxanthinifaciens.

摘要

Astaxanthin (2) (Figure 1) is a red carotenoid renowned for a high antioxidant activity.1 Owing to the protective function as well as the profitable effect on organoleptic properties, the use of this carotenoid benefits consumer acceptance of commercial products. Currently, it is extensively used as feed additives for fish, lobsters and chickens. Astaxanthin is also used as a nutraceutical and medicinal ingredient against degenerative diseases, such as cancer, skin-related illness and heart diseases. An astaxanthin-containing microalga has provided a new strategy in treatment against Helicobacter pylori infection.5 Thus, this carotenoid species provides wide application in agricultural, medicinal and pharmaceutical industries.