Caffeine molecule. Caffeine is a naturally-occurring alkaloid and a stimulant of the central nervous system. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red). | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / GREG WILLIAMS |
Taille de l’image : | 5770 px × 6058 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |