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| Other names | 4-O-Desmethylmescaline; 4-Desmethylmescaline; 3,5-Dimethoxy-4-hydroxyphenethylamine; 4-Hydroxy-3,5-dimethoxyphenethylamine; 3,5-Dimethoxytyramine; DESMETHYL; NSC-167759; NSC-167759 |
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| Formula | C10H15NO3 |
| Molar mass | 197.234 g·mol−1 |
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4-O-Desmethylmescaline, also known as 3,5-dimethoxy-4-hydroxyphenethylamine, 3,5-dimethoxytyramine, or DESMETHYL, is an alkaloid and drug of the phenethylamine and scaline families related to mescaline. [1] [2] It is the analogue of mescaline in which the methyl ether at the 4-position hydroxyl group has been removed. [1] [2]
The compound occurs naturally in various cacti species, for instance those of the genera Lophophora , Trichocereus , Opuntia , and Stenocereus , among others. [1] It also occurs in certain Acacia species. [1] 4-O-Desmethylmescaline may be a biosynthetic precursor of mescaline in cacti and is also known to be a minor metabolite of mescaline. [1] [3] [4]
It is known to be pharmacologically active in cats, including producing catatonia and a hypokinetic rigid syndrome similarly to large doses of mescaline. [1] [5] According to Alexander Shulgin, the effects of 4-O-desmethylmescaline in humans are unknown, and it is unclear whether it might have psychedelic effects similarly to mescaline. [1] However, according to John Raymond Smythies, 4-O-desmethylmescaline has no hallucinogenic activity, although this conclusion was based on the Winter and Flataker rope-climbing test in rats (where mescaline is active, 3,4-dimethoxyphenethylamine is 50% as active as mescaline, and 4-O-desmethylmescaline is completely inactive), rather than on tests in humans. [6] [5] [7] [8]
SMYTHIES and LEVY [358] compared the psychopharmacological behavior of some mescaline analogs using the rope climbing test. They found that the removal of the 5-OCH3 group from mescaline caused a 50 % decrease in activity, while demethylation of the 4-OCH3 group resulted in complete loss of activity. Substitution of benzyloxy group for the 4-OCH3 group increased the activity. Dopamine had very little behavioral effect but 5-hydroxydopamine had a moderate degree of activity.
The available analogues of mescaline which have been tested have, in general, less psychotomimetic activity than mescaline itself. Smythies26 has started an investigation of mescaline analogues and has mentioned that 3,4-dimethoxyphenethylamine has half the activity of mescaline, whereas 4-hydroxy-3,5-dimethoxyphenethylamine has none and 4-benzyloxy-3,5-dimethoxyphenethylamine has greater activity than mescaline. [...] 26 Smythies, Lancet, 1960, I, 1287
A start has been made at the Worcester Foundation (Smythies and Levy 1960) where the effect of all available analogues of mescaline have been investigated, using the Winter and Flataker (1958) rat rope-climbing test. 3 : 4 dimethoxyphenylethylamine has only half the activity of mescaline (3 : 4 : 5 trimethoxyphenylethylamine). Replacement of the methoxy group in the 4 position by a hydroxy group abolishes all activity where its replacement by a benzyloxy group increases activity.