Glipizide, molecular model. This drug is used to treat type 2 diabetes. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red), nitrogen (blue) and sulphur (yellow).

Levofloxacin antibiotic, molecular model. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red) and fluorine (light blue).

Histidine. Molecular model of the amino acid histidine. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

Modafinil, molecular model. This stimulant drug is used to treat narcolepsy. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red), nitrogen (blue) and sulphur (yellow).

Ciprofloxacin antibiotic, molecular model. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red) and fluorine (light blue).

RDX, molecular model. This explosive is also known as T4 and cyclonite. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

Docetaxel, molecular model. This anti-cancer drug is marketed as Taxotere. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

"Neostigmine drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

Tramadol, molecular model. This is a synthetic opioid analgesic (painkiller) drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

"Neostigmine drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

Enalapril, molecular model. This is an ACE inhibitor drug used to treat hypertension (high blood pressure) and chronic heart failure. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

Tiagabine, molecular model. This drug, marketed as Gabitril, is used to prevent seizures in epileptics. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue), oxygen (red) and sulphur (yellow).

"Tropicamide mydriatic eye drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Kanamycin antibiotic drug molecule (aminoglycoside). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Tetracaine local anesthetic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Tropicamide mydriatic eye drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Paromomycin aminoglycoside antibiotic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Tetracaine local anesthetic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Indacaterol COPD drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Indacaterol COPD drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Primaquine malaria drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Kanamycin antibiotic drug molecule (aminoglycoside). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Primaquine malaria drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Peramivir influenza drug molecule (neuraminidase inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

Nitroglycerin, molecular model. This chemical is used as a heart drug and an explosive. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).