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Cannabis Science

Synthetic & Altered Cannabinoids: Metabolites, HHC, Pharma & Spice

Cannabinoid index · Altered & non-natural

Not every cannabinoid comes from the plant or the body. This index covers the “altered” cannabinoids in four groups: metabolites the body makes from THC and CBD (including the one drug tests look for), semi-synthetic cannabinoids converted in a lab from hemp (HHC, THC-O and the rest), approved and investigational pharmaceuticals, and the fully synthetic “Spice/K2” research chemicals.

Safety note. The semi-synthetic and synthetic-research-chemical rows are listed for education and harm reduction only. The Spice/K2 compounds are potent, unpredictable and have been linked to serious harm and deaths; some semi-synthetics (THC-O, HHC-O) can form a toxic gas (ketene) when heated and must never be vaped. Nothing here is a recipe: no synthesis routes, doses or sources appear on this site.
CompoundFormulaIntoxicating?Known for / notesStatus
Human metabolites — what the body makes FROM cannabinoids
11-Hydroxy-THC (11-OH-THC)C21H30O3Yes (active)Active THC metabolite; prominent from edibles
11-Nor-9-carboxy-THC (THC-COOH)C21H28O4NoThe drug-test metabolite; inactive
7-Hydroxy-cannabidiol (7-OH-CBD)C21H30O3NoMajor active CBD metabolite
7-Carboxy-cannabidiol (7-COOH-CBD)C21H28O4NoTerminal CBD metabolite
Semi-synthetic / converted — consumer “novel” cannabinoids
Hexahydrocannabinol (HHC)C21H32O2YesHydrogenated THC; more oxidation-stable
THC-O-acetate (THC-O)C23H32O3Yes (prodrug)INHALATION HAZARD: heating can form ketene; do not vape
HHC-O-acetate (HHC-O)C23H34O3YesAcetylated HHC; same ketene caution as THC-O
Hydrogenated CBD (H4CBD)C21H34O2NoHydrogenated CBD analog
Hexahydrocannabiphorol (HHCP)C23H36O2Yes (potent)Hydrogenated 7-carbon analog
Pharmaceutical — approved or investigational medicines
DronabinolC21H30O2YesSynthetic Delta-9-THC (Marinol/Syndros); chemo nausea, AIDS anorexia
NabiloneC24H36O3YesSynthetic THC analog (Cesamet); chemo nausea
Nabiximols–YesSativex spray (1:1 THC:CBD); MS spasticity
RimonabantC22H21Cl3N4ONoAnti-obesity CB1 blocker; withdrawn for psychiatric effects
Dexanabinol (HU-211)C25H38O3NoNon-psychotropic enantiomer; NMDA antagonist
Synthetic (Spice / K2 research chemicals) — educational only
JWH-018C24H23NOYes (potent)First-generation ‘Spice’; potent CB1 full agonist, high harm risk
JWH-073C23H21NOYesEarly Spice agonist
CP-55,940C24H40O3YesPfizer reference agonist; potency benchmark
WIN-55,212-2C27H26N2O3YesWidely used lab agonist
HU-210C25H38O3Yes (very potent)~100-800x THC potency; strictly research
AM-2201C24H22FNOYes (potent)Second-gen Spice; high harm risk
5F-MDMB-PINACA (5F-ADB)C20H28FN3O3Yes (toxic)Recent-gen; linked to deaths, severe toxicity
MDMB-4en-PINACAC21H29N3O3Yes (toxic)Widely detected recent-gen agonist

“Forensic” status means the compound is characterised mainly through seizures and toxicology, not medical research. “Research tool” means it exists to study the receptors, not for human use.

Part of the NOIDS cannabinoids index · see also phytocannabinoids and endocannabinoids. Educational reference, not medical advice.

This article is for educational purposes only. Always follow local laws regarding cannabis preparation and use.

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