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Highly oxygenated ent-pimarane-type diterpenoids from the Chinese liverwort Pedinophyllum interruptum and their
Na Liu1, Rui-Juan Li, Xiao-Ning Wang
1Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , No. 44 West Wenhua Road, Jinan 250012, People's Republic of China.
Abstract:
Ten highly oxygenated ent-pimarane-type diterpenoids, pedinophyllols A-J (1-10), were isolated from the Chinese liverwort Pedinophyllum interruptum. Their structures were determined by comprehensive analysis of spectroscopic data together with single-crystal X-ray diffraction analysis. The absolute configurations were elucidated by comparison of experimental and theoretically calculated electronic circular dichroism spectra. Allelopathic testing showed that several new diterpenoids inhibited germination of Arabidopsis thaliana seeds.