<unk> 's chemical name is derived from codeine. The chemical structures are very similar, differing only in that *<unk>  has a hydroxy group at carbon-14 (codeine has just a hydrogen in its place) *<unk>  has a 7,8-dihydro feature. Codeine has a double bond between those two carbons; and *<unk>  has a carbonyl group (as in ketones) in place of the hydroxyl group of codeine. It is also similar to hydrocodone, differing only in that it has a hydroxyl group at carbon-14. Biosynthesis In terms of biosynthesis,<unk>  has been found naturally in nectar extracts from the orchid family Epipactis helleborine; together along with another opioid: 3-{2-{3-{3-benzyloxypropyl}-3-indol, 7,8-didehydro- 4,5-epoxy-3,6-d-morphinan. Detection in biological fluids<unk>  and/or its major metabolites may be measured in blood or urine to monitor for clearance, non-medical use, confirm a diagnosis of poisoning, or assist in a medicolegal death investigation. Many commercial opiate screening tests cross-react appreciably with<unk>  and its metabolites, but chromatographic techniques can easily distinguish<unk>  from other opiates.
Oxycodone
Hydrocodone
Codeine
Morphine
Noroxycodone
Norhydrocodone
Tramadol
Piperoxan