Cannabicyclolic acid (CBLA)

Molecular Formula: C₂₂H₃₀O₄
Image credit: Wikimedia Commons

CBLA was first isolated by Shoyama et al. (1972).

CBLA is not an original cannabinoid but an artificial product, converted from cannabichromenic acid(CBCA) by natural irradiation during the storage of the Cannabis. Cannabis. VI. Cannabicyclolic acid.
Shoyama, Y., Oku, R., Yamauchi, T., Nishioka, I.,
Chemical and Pharmaceutical Bulletin 20 (9), 1927 – 1930.
http://doi.org/10.1248/cpb.20.1927