C-Glucuronidation of the acetylenic moiety of ethchlorvynol in the rabbit

An acetylenic C-glucuronide of the sedative-hypnotic drug ethchlorvynol was isolated from rabbit urine as the major metabolite. The C-glucuronide represents a novel metabolic pathway for acetylenes and is a rare example of the formation of a carbon-glucuronide bond in mammalian systems.