acid

adicillin

and

antibiotic

antimicrobial

atom

atomic

background

ball

biology

black

carbon

carboxylic

chemistry

compound

dimensional

drug

dynamic

hydrogen

infection

isolated

medication

medicine

microbiology

model

molecule

motion

nitrogen

organic

oxygen

penicillin

pharmaceutical

pharmacology

pharmacy

ring

rotation

science

spin

stick

structure

sulfur

sulphur

therapy

three

treatment