Related Experiment Video
Updated: Sep 28, 2026

Transient Expression in Nicotiana Benthamiana Leaves for Triterpene Production at a Preparative Scale
Published on: August 16, 2018
Antioxidative 7-oxodehydropodocarpane-type trinorditerpenes from the bark of Taiwania cryptomerioides
Yueh-Hsiung Kuo1, Shih-Chang Chien, Ching-Chuan Kuo
1Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China. yhkuo@ccms.ntu.edu.tw
Abstract:
Five new 7-oxopodocarpane-type trinorditerpenes together with 1beta,13,14-trihydroxy-8,11,13-podocarpatrien-7-one ( 1) were isolated from the bark of Taiwania cryptomerioides. By using NMR and other spectral methods, the structures of five new compounds, 14-hydroxy-13-methoxy-8,11,13-podocarpatriene-3,7-dione ( 2), 1beta,14-dihydroxy-13-methoxy-8,11,13-podocarpatrien-7-one ( 3), 13,14-dihydroxy-8,11,13-podocarpatriene-3,7-dione ( 4), 3beta,13,14-trihydroxy-8,11,13-podocarpatrien-7-one ( 5), and 1beta,13,14-trihydroxy-8,11,13-podocarpatriene-2,7-dione ( 6), were elucidated. Compounds 1, 4, 5, and 6 exhibited strong antioxidative activity.
Related Concept Videos
Radical Autoxidation
Oxidation of Phenols to Quinones
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide