Hideyo Takahashi

February 27, 2026

Structural Elucidation of Azo and Quinoneimine Products Formed in Diazonium-Based Color Reactions of Cannabinoids

Abstract Cannabis use is generally restricted worldwide because it contains the narcotic compound Δ9-tetrahydrocannabinol (Δ9-THC). Although cannabis is detected at…

January 13, 2026

Stereoselective Synthesis and Structural Confirmation of All Four 8-Hydroxyhexahydrocannabinol Stereoisomers

Abstract Hexahydrocannabinol (HHC), a hydrogenated derivative of Δ9-tetrahydrocannabinol (Δ9-THC), is a semi-synthetic cannabinoid marketed as an alternative to Δ9-THC. Its…

August 22, 2025

Isolating and Determining the Structures of Colored Products from the Reactions of Cannabinoids with Fast Blue RR

Abstract Although cannabis is used in a wide range of fields, including medicine and pharmacology, its use is prohibited in…