Opioid metabolites

Morphine-N-oxide (genomorphine) is an active opioid metabolite of morphine.

3-Monoacetylmorphine (3-MAM) or 3-acetylmorphine is a less active metabolite of heroin (diacetylmorphine), the other two being morphine and more active 6-monoacetylmorphine (6-MAM).

Oxymorphol is oxymorphone which has been hydrogenated at the 6-position and consists of a mixture of 4,5α-Epoxy-17-methylmorphinan-3,6β,14-triol and 4,5α-Epoxy-17-methylmorphinan-3,6α,14-triol (hydromorphinol).

Norbuprenorphine is a major active metabolite of the opioid modulator buprenorphine.

Norpethidine (normeperidine, pethidine intermediate B) is a 4-phenylpiperidine derivative that is both a metabolite of and a precursor to pethidine (meperidine).

Norpropoxyphene is a major metabolite of the opioid analgesic drug dextropropoxyphene, and is responsible for many of the side effects associated with use of this drug, especially the unusual toxicity seen during dextropropoxyphene overdose.

Norcodeine is an opiate analogue that is the N-demethylated derivative of codeine.

Normorphine is an opiate analogue, the N-demethylated derivative of morphine, that was first described in the 1950s when a large group of N-substituted morphine analogues were characterized for activity.

6-Monoacetylcodeine (6-MAC) is an acetate ester of codeine in which the hydroxyl group on the 6 position has been acetylated.

Pseudomorphine (also known as oxydimorphine or dehydromorphine) is an inactive, natural dimerisation product of the morphine molecule in tandem and thus a common impurity in morphine concentrations.

O-Desmethyltramadol (O-DSMT) is an opioid analgesic and the main active metabolite of tramadol.

Buprenorphine-3-glucuronide (B3G) is a major active metabolite of the opioid modulator buprenorphine.

Norbuprenorphine-3-glucuronide (N3G) is a major active metabolite of the opioid modulator buprenorphine.

Dihydromorphine (Paramorfan, Paramorphan) is a semi-synthetic opioid structurally related to and derived from morphine.

6-Monoacetylmorphine (6-MAM) or 6-acetylmorphine (6-AM) is one of three active metabolites of heroin (diacetylmorphine), the others being morphine and the much less active 3-monoacetylmorphine (3-MAM).

Morphine-6-glucuronide (M6G) is a major active metabolite of morphine, and as such is the molecule responsible for much of the pain-relieving effects of morphine and heroin - M6G is formed from morphine by the enzyme UDP-Glucuronosyltransferase-2B7 (UGT2B7).

Morphine-3-glucuronide is a metabolite of morphine produced by UGT2B7.

Codeine-6-glucuronide (C6G) is a major active metabolite of codeine and may be responsible for as much as 60% of the analgesic effects of codeine.