Ключевые слова: 3d, antibacterial, antimicrobial, antiviral, atom, atomic, c17h19n3o, carbon, chemical, chemistry, composition, compound, dietary, disease, drawing, drug, flat, food, formula, health, health care, hydrogen, hypertension, icon, line, medical, medicine, model, molecular, molecule, nitrogen, nonselective adrenergic antagonist, organic, oxygen, pharmaceutical, pharmacist, pharmacology, phentolamine, regitine, research, science, skeletal, stimulant, structure, sulfur, supplement, treatment,