PiHKAL · info

Cover of PiHKAL: A Chemical Love Story. 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 medicines, 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 skeleton

All phenethylamines on this website are drawn with the ring locants arranged clockwise, as drawn at left. This is sometimes at odds with the practice followed in PiHKAL


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.
22 July 2017 · Creative Commons BY-NC-SA ·

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Absorbing bits of material

PiHKAL · info Statistics

6230 Total
3308 Phenethylamine
1919 Undefined
649 Tryptamine
116 Lysergamide
97 Other
77 β-Carboline
64 Isoquinoline