Isomethadol

Isomethadol is an opioid analgesic with a number of stereoisomers (viz. alpha and beta forms of dextro, laevo, and racemic isomers for a total of six) produced by the reduction of d,l-isomethadone with lithium aluminium hydride. It was first produced in the United States in 1948. The salt used in research is the hydrochloride.