Definition: Chemical term describing an oxygen atom bound to two linked carbon atoms Generally, any cyclic ether, but commonly applied to a three-membered ring; specifically, a three-membered ring is an oxirane, a four-membered ring is an oxetane, a five-membered ring is an oxolane, and a six-membered ring is an oxane; oxiranes are commonly produced from peracids acting on alkenes. Epoxys are important chemical intermediates and the basis of epoxy resins (polymers) formed from epoxy monomers.
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Examples: glitazone, GI cocktail, etc.