molecule of penicillin, antibiotics chemical formula

penicillin molecule formula chemical icon 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 compound penicillium biochemistry outline thin hexagon diagram antimicrobial isolated white background penicillins icons signs logos clipart web flat abstract clip art symbols computer graphics cartoon concept molecules atoms formulas