New clerodane diterpenoids from Casearia sylvestris |
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| Authors: | Wei Wang Zulfiqar Ali Xing-Cong Li Troy A Smillie De-An Guo Ikhlas A Khan |
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| Institution: | aNational Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, University of Mississippi, Oxford, MS 38677, USA;bDepartment of Pharmacognosy, School of Pharmacy, University of Mississippi, Oxford, MS 38677, USA;cShanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, CAS, Shanghai 201203, PR China |
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| Abstract: | Two new clerodane diterpenoids 2β-methoxy-cleroda-3,13-dien-18-carboxy-15,16-olide (1) and 15ξ-methoxy-cleroda-3,12-dien-18-carboxy-15,16-olide (2) and one new nitrogen-containing clerodane diterpenoid 15-oxo-echinophyllin A (3), along with six known compounds, namely, echinophyllin A, (−)-patagonic acid, tyrosol, oplopanone, 4-hydroxy-4-methyl-2-(1R)-1-(1-methylethyl)-4-oxopentyl]-2-cyclohexen-1-one and 1β,6α-dihydroxy-eudesman-4(15)-ene were isolated from the leaves of Casearia sylvestris. Their structures were determined by extensive NMR techniques. |
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| Keywords: | Flacourtiaceae Casearia sylvestris Clerodane diterpenoid |
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