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Browse the short index of PiHKAL phenethylamines. Read book II of PiHKAL
Search for phenethylamines and related structures Beyond PiHKAL—Selected writings by Sasha and others. Explore phenethylamine structures and analogues
The essential oils and their amphetamine analogues How PiHKAL • info differs from the printed version
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Cover of PiHKAL: A Chemical Love Story, by Alexander & Ann Shulgin. Cover art by Pamela Engebretson PiHKAL • info is a visual index and map of “PiHKAL: A Chemical Love Story,” by Alexander & Ann Shulgin. PiHKAL is the extraordinary record of the authors’ years exploring the chemistry and transformative power of psychedelic drugs, and phenethylamines in particular.

PiHKAL (the book) covers a lot of ground. There are detailed reports on 179 substances, and mention of perhaps 150 more. Still other phenethylamines, not discussed in the book, are known or are suspected to have psychedelic potential. PiHKAL • info is my attempt to map out the terrain.

Numbering of the Phenethylamine skeletonAll phenethylamines on this website are drawn with the ring locants arranged clockwise, shown at left. This is sometimes at odds with the practice followed in PiHKAL.


Sasha & Ann have been in serious financial trouble for some years, and the coming medical bills will be a burden they can’t bear alone. Please, express your gratitude for all the work that Sasha has done, for everything he has given to the world, and give something back.

Page updated 28 February 2014 · This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License ·

phen-ethyl-amine \fen-'eth-al-a-,mēn\ n. [phenyl fr. F. phène, fr. Gk. phainein, to show (from its occurrence in illuminating gas) + ethyl (ether + yl + amine fr. NL ammonia] 1: A naturally occurring compound found in both the animal and plant kingdoms. It is an endogenous component of the human brain. 2: Any of a series of compounds containing the phenethylamine skeleton, and modified by chemical constituents at appropriate positions in the molecule.


PiHKAL • info Statistics

3534 Total
2640 Phenethylamine
530 Tryptamine
114 Lysergamide
89 Other
77 β-Carboline
58 Isoquinoline
26 Undefined

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