What Are Psilocybin Derivatives?

There are many compounds closely resembling psilocybin from a chemical structure standpoint. However, the chemical and pharmacological understanding of these psilocybin derivatives is few and far between.


Magic mushrooms (aka psilocybin mushrooms or psychedelic mushrooms) contain many molecules aside from psilocybin. For the most part, these psilocybin derivatives (aka psilocybin analogs) can be described as a family of tryptamine compounds. In that context, the term psilocybin derivatives refer to a collection of molecules sharing a common chemical structure with psilocybin.

Psilocybin derivatives share a tryptamine core attached to an ethyl amino group, as illustrated in Figure 1. The groups designated with an R can be varied as needed to define specific molecules in this chemical family.

Figure 1: The general chemical structure defining a set of psilocybin derivatives.

For example, psilocybin is described by substituting the given R groups with the atoms as shown below.

  • R3 = R4 = R6 = R7 = R8 = R9 = Hydrogen atom (H)
  • R5 = Phosphate ester group = OPO(OH)2
  • R1 = R2 = methyl group = CH3

Applying those selections results in the molecule psilocybin as shown in Figure 2.

Figure 2: Chemical structure of psilocybin. Psilocybin is one of many known psilocybin derivatives.

Other examples of psilocybin derivatives include:

  • Psilocin – Dephosphorylated psilocybin.
  • Norpsilocin – Psilocin with one methyl in the ethyl amino group.
  • Aeruginascin – Psilocybin with three methyl groups in the ethyl amino group.
  • Baeocystin – Psilocybin with one methyl in the ethyl amino group.
  • Norbaeocystin – Psilocybin with no methyl groups on the ethyl amino group.
  • Bufotenin – Psilocin substituted on the 5th carbon instead of the 4th.
  • Bufotenidine – Bufotenin with three methyl groups on the ethyl amino group.

Why Are Psilocybin Derivatives Important?

Psilocybin derivatives are important because what are considered to be minor chemical differences in a molecule can make a big difference in the body. For example, consider the difference between amphetamine and methamphetamine.  The difference is one methyl group on the amine group (Figure 3).

Figure showing the differences between Amphetamine and Methamphetamine

Figure 3: The chemical structures of amphetamine and methamphetamine.

Amphetamine and methamphetamine differ by only one methyl group. This minor structural difference results in significant differences in the properties of the drug and its effects at the cellular level.1

Now, consider the structural difference between psilocybin and baeocystin (Figure 4).

Figure 4: The chemical structures of psilocybin and baeocystin.

As discussed previously, psilocybin differs from baeocystin by one methyl group. For the non-chemist, each of the straight lines coming off of the nitrogen atom (N) represents a CH3 or methyl group (see Figure 4). The minor structural difference (by one methyl group) illustrated above could potentially have dramatic effects at a cellular level.

However, this is not to suggest that baeocystin and psilocybin have pharmacological differences akin to those known for amphetamine and methamphetamine. The point is that scientists have virtually no idea how baeocystin’s pharmacology differs from psilocybin’s pharmacology. The same holds for the other psilocybin derivatives like aeruginascin.

Moving Ahead with Researching Psilocybin Derivatives

Not all magic mushrooms are created equal. According to world-famous mushroom expert Paul Stamets, there are over 100 known species of psychoactive mushrooms containing psilocybin, psilocin, baeocystin, and norbaeocystin.2 Anecdotal evidence from experience reports on sites like Erowid and Reddit suggests that the subjective effects of these mushrooms differ considerably. Those differences can be understood by (1) studying the chemotype (aka the molecular composition) of each species and (2) correlating the chemotype with the observed effects.

In other words, it is worthwhile to invest research time in understanding the chemistry and pharmacology of psilocybin and its derivatives. Ultimately, developing a better understanding of the molecules in magic mushrooms will pave the way for formulated products.

Barb Bauer Headshot

Barb is the former Editor and one of the founders of Psychedelic Science Review. She is currently a contributing writer. Her goal is making accurate and concise psychedelic science research assessable so that researchers and private citizens can make informed decisions.


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4 years ago

Are there any derivatives that can be bought as research chemicals? Huge mahalo ♥️

Laurence Bey
3 years ago

Very informative thank you.