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.

Delta9-tetrahydrocannabinolic acid (Δ9-THCA)

Δ9-THCA was first identified in 1964.

Further reading