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Formula | C23H29N3O2 |
Molar mass | 379.504 g·mol−1 |
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1P-LSD (1-propanoyl-lysergic acid diethylamide) is a psychedelic drug of the lysergamide class that is a derivative and functional analogue of LSD and a homologue of ALD-52. It originated in 2015 when it appeared a designer drug sold online. [1] It was first synthesized as a legal-LSD alternative by Lizard Labs, a Netherlands based research chemical laboratory. [2] [3] [4] [5] [6] [7] It modifies the LSD molecule by adding a propionyl group to the nitrogen atom of LSD's indole group. [8] [9]
Like ALD-52, 1P-LSD is believed to act as a prodrug for LSD via hydrolysis of the propionyl group. When 1P-LSD is incubated in human serum, [10] administered intravenously to rats, [11] or administered either orally or intravenously to human subjects, [12] high levels of LSD and relatively low levels of 1P-LSD are quickly detected, demonstrating that 1P-LSD is rapidly hydrolyzed into LSD in vivo following ingestion. Indeed, following intravenous administration in humans 1P-LSD is detectable in serum for no longer than 4 hours, after which it is completely converted to LSD. [12] These findings are supported by the similar duration and behavioral effects of 1P-LSD and LSD in both animal and human experiments. [10] [12]
The subjective effects of 1P-LSD are not well defined in the scientific literature, although they are generally thought to be comparable to that of LSD. [13] In a 2020 study, the qualitative effects of 1P-LSD and LSD were similar when measured using visual analog scales.
As of 2015, 1P-LSD is unscheduled in the United States and Canada, but may be considered illegal if sold or used for human consumption as a structural analog of LSD under the Federal Analogue Act in the US. [10] 1P-LSD is a prohibited or controlled substance in Australia, France, [14] Finland, [15] Denmark, [16] Germany, [17] Estonia, [18] Japan, [19] Latvia, [20] Norway, [21] Romania, [22] Sweden, [23] Switzerland, [24] United Kingdom, [25] Italy, [26] Singapore, [27] the Czech Republic, [28] and Croatia. [29] 1P-LSD has been illegal in Russia since 2017 as an LSD derivative. [30]