Dronabinol

Actually, "dronabinol" can be produced in two different ways, and both confirm Shulgin's conclusion that the final product is identical to what the plant creates.

1. Where does it come from?

The source depends on the specific manufacturer and the era. There are two main "recipes" used to make medical-grade dronabinol:

Conversion from CBD: In many modern processes, manufacturers start with Cannabidiol (CBD) extracted from hemp.[ 1 ]

CBD and THC are "isomers" of each other—they have the exact same atoms, just "folded" differently.[ 1 ]

By using a chemical catalyst, chemists can "unfold" the CBD and "re-fold" it into THC.

Total Synthesis: Other manufacturers build the molecule from scratch using simpler chemicals like olivetol and p-menthadienol.[ 2 ]

This is a purely "test-tube" process that doesn't involve any part of a cannabis or hemp plant.

2. How are they sure it's identical?

This is the part that Shulgin was obsessing over in his letters. In chemistry, it isn't enough to have the same "parts"; you have to have the same "handing" (chirality).

Think of your left and right hands: they have the same fingers and parts, but they are mirror images. Most chemicals have "left-handed" (l) and "right-handed" (d) versions.

The Plant's Version: Cannabis naturally produces only the "left-handed" (l-trans) version of THC.[ 3 ]

The Lab's Version: When chemists make THC in a lab, they use stereoselective synthesis.[ 1 ]

This means they choose starting materials and chemical reactions that only allow the molecule to fold in that specific "left-handed" way.

3. How do we know it's the same?

Manufacturers use a technique called Polarimetry. They shine a beam of polarized light through the liquid THC.

If it's the l-isomer, the light rotates to the left.[ 4 ]

If it rotates exactly as much as the natural version, they have proof that it is biologically and chemically identical.

The Conclusion

Shulgin's point was that once the chemist is done, you have a vial of pure (-)-trans-delta-9-THC.

If you took that vial and a vial of THC extracted from a plant and handed them to a scientist without labels, there is no test in existence that could tell them apart.[ 1 ]

They are the exact same substance.

Gemini



1. Cannabis Cannabinoids: Recent Review of Chemistry and Analysis - ACS Publications

2. Dronabinol - an overview | ScienceDirect Topics

3. The Chemistry of the Natural Cannabinoids - UNODC

4. Marijuana (Cannabis) - Special Subjects - Merck Manuals Professional Edition

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