title: A procedure to overcome interferences caused by the adulterant "Klear" in the GC-MS analysis of 11-nor-delta9-THC-9-COOH.
authors.forename: M A
authors.initials: MA
authors.lastname: ElSohly
authors.forename: S
authors.initials: S
authors.lastname: Feng
authors.forename: W J
authors.initials: WJ
authors.lastname: Kopycki
authors.forename: T P
authors.initials: TP
authors.lastname: Murphy
authors.forename: A B
authors.initials: AB
authors.lastname: Jones
authors.forename: A
authors.initials: A
authors.lastname: Davis
authors.forename: D
authors.initials: D
authors.lastname: Carr
mesh_terms: D013759:Dronabinol / Q000031:analogs & derivatives* / Q000652:urine; D004347:Drug Interactions; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D012015:Reference Standards; D013056:Spectrophotometry, Ultraviolet
chemical_list: C016780:11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid; D013759:Dronabinol