Oxibendazole is a benzimidazole

Benzimidazole

Benzimidazole is a heterocyclic aromatic organic compound. This bicyclic compound consists of the fusion of benzene and imidazole. The most prominent benzimidazole compound in nature is N-ribosyl-dimethylbenzimidazole, which serves as an axial ligand for cobalt in vitamin B12. Benzimidazole, in...

 drug that is used to protect against roundworms, strongyles, threadworms, pinworm

Pinworm

The pinworm , also known as threadworm or seatworm, is a nematode and a common human intestinal parasite, especially in children...

s and lungworm

Lungworm

Lungworms are parasitic nematode worms of the order Strongylida that infest the lungs of vertebrates. The name is used for a variety of different groups of nematodes, some of which also have other common names; what they have in common is that they migrate to their hosts' lungs or respiratory...

 infestations in horses and some domestic pets. It is usually white to yellowish in appearance, and may take the form of a powder or a tablet.

Oxibendazole can be synthesized from acetominophen by the following route: