Terpenoids with potent antimycobacterial activity against Mycobacterium tuberculosis from Trigonostemon reidioides roots. Issue 12 (23rd March 2017)

• Record Type: Journal Article
• Authors: Kaemchantuek, Praphakorn; Chokchaisiri, Ratchanaporn; Prabpai, Samran; Kongsaeree, Palangpon; Chunglok, Warangkana; Utaipan, Tanyarath; Chamulitrat, Walee; Suksamrarn, Apichart
• Is Part Of: Tetrahedron. Volume 73:Issue 12(2017)
• Page Start: 1594
• Page End: 1601
• Publication Date: 2017-03-23
• Subjects: Trigonostemon reidioides -- Diterpenoids -- Antimycobacterial activity; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2017.02.006
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: Phytochemical investigation of Trigonostemon reidioides roots led to the isolation of fourteen compounds. These included six new diterpenoids, trigonoreidons A−F (1 −6 ), together with eight known diterpenoids7 −14 . The structures of the new compounds were elucidated by spectroscopic techniques and the absolute configuration at the asymmetric carbon was determined by the modified Mosher's method. The structure of trigonoreidon B (2 ) was confirmed by X-ray crystallographic analysis. The known compounds were identified by comparison of the spectroscopic and physical data with those of reported values. The isolated compounds were evaluated for antimycobacterial activity against Mycobacterium tuberculosis . Among the compounds that exhibited antimycobacterial activity, the diterpenoids rediocide C (12 ) and rediocide G (14 ) were the most active compounds, with the MIC value of 3.84 μM. Graphical abstract: Highlights: Six new and eight known diterpenoids were isolated from Trigonostemon reidioides roots. The diterpenoids were evaluated for antimycobacterial activity against Mycobacterium tuberculosis. Rediocide C (12 ) and rediocide G (14 ) were the most active compounds, with the MIC value of 3.84 μM.