isotretinoin is a retinoid, it is related to vitamin a structur

acid acne atom atomic cage carbon carotenoid carrot chemical chemistry colitis colon compound crohn dermatology disease education embryo epigenetic formula hydrogen ichthyosis illustration isotretinoin medicine metabolism molecular molecule notebook organic oxygen retina retinene retinoic retinoid schematic science sebum sheet structural structure study teratogenic treatment tretonoin vector vitamin