CYTOTOXIC EVALUATION AND CONCURRENT ANALYSIS OF TWO DITERPENES IN THE CHLOROFORM EXTRACT OF PLECTRANTHUS BARBATUS USING A VALIDATED HPTLC-UV METHOD. - Amina, Musarat; Al-Musayeib, Nawal M.; Alam, Perwez; Aleanizy, Fadilah S.; Alqahtni, Fulwah Y.; Al-Said, Mansour S.; Al-Rashidi, Nada S.; Shakeel, Faiyaz (Bulletin of the Chemical Society of Ethiopia, 2018)