penicillin chemical formula, molecule structure

penicillin formula molecule icon chemical structure antibiotic penicilin molecular chemistry chemicals vector penecillin antibiotics cell research medical medicine drug pill aspirin fever reliever reducer science graph graphic sign symbol logo pictogram biomedicine atomic model design line pharmacology pharma pharmacy simple drawing skeletal structural scheme penicillium antimicrobial biochemistry health outline thin hexagon diagram flat isolated white background penicillins compound formulas molecules