1. Diterpenoids and flavonoids from Ophryosporus charrua
- Author
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Oscar S. Giordano, Carlos E. Tonn, Laura S. Favier, and Matias Nieto
- Subjects
chemistry.chemical_classification ,Ophryosporus ,biology ,Stereochemistry ,Flavonoid ,Ether ,Plant Science ,General Medicine ,Horticulture ,Carbon-13 NMR ,biology.organism_classification ,Biochemistry ,Flavones ,chemistry.chemical_compound ,chemistry ,Organic chemistry ,Diterpene ,Molecular Biology - Abstract
Two new diterpenes and four known flavones were isolated from the aerial parts of Ophryosporus charrua (Griseb. Hieron. The diterpenes were characterized as 2-oxo-3α-hydroxy- ent -labd-7-en-15-oic acid and 2-oxo- ent -haliman-1(10), 7-dien-15-oic acid. The structures were established by analyses of their 1 H and 13 C NMR spectra with the aid of 2D experiments and chemical transformations. The flavones were identified as apigenin-7,4′-dimethyl ether, circimaritine, salvigenin, and 7- O -methyleriodictyol. © 1997 Elsevier Science Ltd. All rights reserved
- Published
- 1997