![](http://www.alamy.com/thumbs/6/C4D88EAA-95E1-4280-A755-880025F28947/2ACCAHN.jpg)
Polarised light micrograph of ampicillin, a semi- synthetic penicillin. Magnification: x25 at 35mm size. (purple to orange)
Size: 5159px × 3464px
Photo credit: © JOHN WALSH/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ampicillin, antibiotic, biochemical, biochemistry, chemical, chemistry, compound, compounds, crystal, crystals, drug, pharmaceutical, pharmaceutics