astaxanthin molecule, molecular structures, c40h52o4 3d model, structural chemical formula and atoms with color coding

astaxanthin molecule molecular structure chemical formula model c40h52o4 carotene atom carbon oxygen hydrogen antioxidant pigment chemistry illustration salmon science shrimp supplement crustacean food carotenoid compound krill organic research skeletal biochemistry structural substance keto terpene education study red xanthophyll bond group medicine chain symbol haematococcus structures atoms color coding coding