astaxanthin is a keto-carotenoid. it belongs to class of chemical terpenes structural chemical formula and molecule model

antioxidant astaxanthin astaxanthine atom atomic beta carbon carotene carotenoid carrot chemical chemistry compound crustacean education formula haematococcus hydrogen illustration keto krill lobster molecular molecule organic oxygen phytochemical pigment red salmon schematic science shrimp structural structure study supplement terpene vector vitamin xanthophyll