Wikipedia
Isomethadol
Isomethadol is a 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.