Ключевые слова: acne, adenine, amide, anxiolytic, atomic, atoms, carbon, chemical, chemistry, coenzyme, composition, compound, dermatology, dinucleotide, drawing, flat, formula, hydrogen, icon, inflammation, line, molecular, molecule, nad, nadp, niacinamide, nicotinamid, nicotinamide, nicotinic, nitrogen, oxygen, pellagra, phosphate, skeletal, skin, structure, vitamin, vulgaris,