Glibenclamide, 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), sulphur (yellow) and chlorine (green).

Indinavir AIDS drug, molecular model. This is a protease inhibitor marketed as Crixivan. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

Atenolol, molecular model. This hypertension (high blood pressure) drug is marketed as Tenormin. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

Saquinavir AIDS drug, molecular model. This is a protease inhibitor marketed as Invirase and Fortovase. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

Zolpidem, molecular model. This sedative drug is used for the short-term treatment of insomnia. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

Zolpidem, molecular model. This sedative drug is used for the short-term treatment of insomnia. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).

Cetylpyridinium chloride, illustration

"Lenvatinib cancer drug molecule (multi-kinase inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Triclabendazole anthelmintic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), sulfur (yellow), chlorine (green). "

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).

Simazine herbicide molecule, illustration

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).

"Suxamethonium chloride (succinylcholine) muscle relaxant drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Suxamethonium chloride (succinylcholine) muscle relaxant drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Pyrimethamine malaria drug molecule. Also used as an antiprotozoal drug. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), chlorine (green), nitrogen (blue). "

"Pyrimethamine malaria drug molecule. Also used as an antiprotozoal drug. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), chlorine (green), nitrogen (blue). "

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

"Lenvatinib cancer drug molecule (multi-kinase inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), chlorine (green). "

"Ixazomib citrate multiple myeloma drug molecule (proteasome inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green), boron (green). "

"Paromomycin aminoglycoside antibiotic 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). "

"Ixazomib citrate multiple myeloma drug molecule (proteasome inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green), boron (green). "

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

"Ixazomib citrate multiple myeloma drug molecule (proteasome inhibitor). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green), boron (green). "

Alprazolam, molecular model. This sedative drug is marketed as Xanax. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and chlorine (green).