astaxanthin pigment molecule. carotenoid responsible for the pink-red color of salmon, lobsters and shrimps. used as food dye (

astaxanthin astaxanthine carotenoid caroten keto phytochemical terpene xanthophyll leaf pigment antioxidant yeast salmon crustacean red food color dye e161j haematococcus krill supplement shrimp lobster hydrogen carbon oxygen molecule atoms atomic model molecular compound composition chemical chemistry bond structure formula