Ethyne molecule. Atoms are represented as spheres and are colour-coded: carbon (black) and hydrogen (white).

Ethane molecule. Atoms are represented as spheres and are colour-coded: carbon (black) and hydrogen (white).

Methane molecule. Atoms are represented as spheres and are colour-coded: carbon (black) and hydrogen (white).

Fructose sugar molecule. This is the ring structure. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white) and oxygen (red).

Methanol molecule, computer artwork. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red).

Carbon dioxide molecule. Atoms are represented as spheres and are colour-coded: carbon (black) and oxygen (red).

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

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

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

Histamine molecule. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white) and nitrogen (blue).

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

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

"Suramin sleeping sickness drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Suramin sleeping sickness drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Suramin sleeping sickness drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Metolachlor herbicide (weed killer) molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), chlorine (green). "

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

"Vincrinstine cancer drug molecule (vinca alkaloid class). Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), 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). "

"Iotroxate (iotroxic acid) contrast agent molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), iodine (purple). "

"Spectinomycin gonorrhoea drug molecule. Antibiotic of the aminocyclitol class. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue). "

"Iotroxate (iotroxic acid) contrast agent molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), iodine (purple). "

"Performic acid (PFA) disinfectant molecule. Used as disinfectant and sterilizer. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red). "

Sec-butanol molecule. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white) and oxygen (red).