Conversion of 7-Carboxy-Cannabidiol (7-COOH-CBD) to 11-Nor-9-Carboxy-Tetrahydrocannabinol (THC-COOH) during Sample Preparation for GC–MS Analysis Posted on August 24, 2023 By sdargoltz E Dale Hart, Svante Vikingsson, John M Mitchell, Ruth E Winecker, Ronald Flegel, Eugene D Hayes J Anal Tox; 46(5); 2022 Table of Contents available Cannabis and Cannabinoids, Chemistry, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology