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JWH-018 (10g)

JWH-018 (10g)

JWH-018 (10g)

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Naphthalen-1-yl-(1-pentylindol-3-yl)methanone
CAS: 209414-07-3

Though based on the structure of WIN 55,212-2, the JWH analogues lack a methyl group at C-2. Various N-Alkyl side chains define the various JWH analogues, which range from N-Propyl (JWH-072) to N-Hexyl (JWH-019) and of course N-Pentyl (JWH-018). The N-Pentyl substitute on the compound reduced CB2 selectivity as compared to N-Butyl substitute (JWH-073, which has a CB1:CB2 affinity ratio of 0.23) [1].
In terms of the structure-activity-relationship (SAR) between CB receptors and their ligands, some primary components are necessary for a best-fit-alignment scenario: the cyclohexene and naphthalene ring, the phenolic hydroxyl and carbonyl group, the carbon side chain at C-3 and the morpholinoethyl group. In the case of JWH-018, the morpholinoethyl group has been replaced with the N-Pentyl side chain, which exhibits similar steric and electrostatic properties as the morpholinoethyl group [1].
N-Alkyl chains of increasing length have been shown to increase binding affinity to CB2 receptors, and are maximized by the 4 and 6 carbon chains of JWH-018, JWH-007, JWH-048, JWH-081 and JWH-098 [6]. Compounds with shorter carbon chain lengths exhibited weak binding affinities and no in vivo activity (JWH-070, JWH-077, and JWH-043), as has also been shown with other CB agonists [7].
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