Cyclohexane is an organic compound with a chemical formula C6H12. It is a colorless liquid with a pungent odor, insoluble in water, and soluble in most organic solvents such as ethanol, ether, benzene, and acetone. Cyclohexyl fragments are a common structure in both natural and synthetic drugs. It can be used as both core structure and part of achiral side chain.
Diazetidines are saturated four-membered rings with two nitrogen atoms. When the two nitrogen atoms are adjacent to each other, the heterocycle is referred to as 1,2-diazetidine, while a four-membered ring composed alternatively of carbon and nitrogen atoms is named 1,3-diazetidine. Such heterocycles might also sometimes be referred to as diazacyclobutanes.
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