tretinoin, molecular structures, all-trans retinoic acid, 3d model, structural chemical formula and atoms with color coding

tretinoin atra molecular structure chemical formula model c20h28o2 alltrans retinoic acid atom oxygen carbon hydrogen bond molecule pharmaceutical health care research medication biochemistry chemistry drug hospital biology science disease composition material acne medical medicine atomic skeletal drawing illustration compound pattern line organic object vitamin nutrient structures all-trans structural atoms color coding retino