Levomoramide

Levomoramide

Systematic (IUPAC) name
(3R)-3-methyl-4-morpholin-4-yl-2,2-diphenyl-1-pyrrolidin-1-yl-butan-1-one
Clinical data
Legal status	AU: S8 (Controlled) DE: Anlage II (Prohibited) US: Schedule I UN: Narcotic Schedule I
Identifiers
CAS Number	5666-11-5
ATC code	none
PubChem	CID: 10453145
ChemSpider	8628561 N
UNII	7M86YFN15D Y
Chemical data
Formula	C25H32N2O2
Molecular mass	392.534
SMILES C[C@@H](CN1CCOCC1)C(c1ccccc1)(c1ccccc1)C(=O)N1CCCC1
InChI InChI=1S/C25H32N2O2/c1-21(20-26-16-18-29-19-17-26)25(22-10-4-2-5-11-22,23-12-6-3-7-13-23)24(28)27-14-8-9-15-27/h2-7,10-13,21H,8-9,14-20H2,1H3/t21-/m0/s1 N Key:INUNXTSAACVKJS-NRFANRHFSA-N N
NY (what is this?)  (verify)

Levomoramide is the inactive isomer of the opioid analgesic dextromoramide, invented by the chemist Paul Janssen in 1956. Unlike dextromoramide, which is a potent analgesic with high abuse potential, levomoramide is virtually without activity.

"Resolution reveals that the analgetic activity in this case resides almost entirely in the (+) isomer."

"In the α-CH₃ series, one of the optical isomers of each enantiomorphic pair is about twice as active as the racemic mixture; the other isomer is devoid of significant analgesic activity."

However, despite being inactive, levomoramide is scheduled by UN Single Convention on Narcotic Drugs.