Delta9-tetrahydrocannabinolic acid (Δ9-THCA)

THCA Image Source: PubChem Molecular Formula: C22H29O4
Image credit: PubChem

Δ9-THCA was first identified in 1964.

The carboxylic acidic precursor of Δ9-THC is Δ9-THCA. Isolation, Structure, and Partial Synthesis of an Active Constituent of Hashish
Y. Gaoni , R. Mechoulam
J. Am. Chem. Soc., 1964, 86 (8), pp 1646–1647
DOI: 10.1021/ja01062a046
Publication Date: April 1964

Δ9-THCA is normally decarboxylated to Δ9-THC by heating or burning.

Further reading

ChemIDplus #23978-85-0
ChEBI #67078
ChemSpider #88974

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