Results 141 to 150 of about 463 (171)

Cytotoxic clerodane diterpenes fromPolyalthia barnesii

Phytochemistry, 1994
Three cytotoxic clerodane diterpenes were purified from an ethyl acetate-soluble extract of the stem bark of Polyalthia barnesii, namely, 16 alpha-hydroxycleroda-3,13(14)Z-dien-15,16-olide, a known compound, and two novel compounds, 3 beta, 16 alpha-dihydroxycleroda-4(18),13(14)Z-dien-15,16-olide and 4 beta, 16 alpha-dihydroxyclerod-13(14)Z-en-15,16 ...
X, Ma, I S, Lee, H B, Chai, K, Zaw, N R, Farnsworth, D D, Soejarto, G A, Cordell, J M, Pezzuto, A D, Kinghorn   +8 more
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Clerodane diterpenoids of Salvia lineata

Phytochemistry, 1986
Abstract The aerial parts of Salvia lineata afforded, in addition to sitosterol, oleanolic acid and flavonoids of known structures, three clerodane derivatives related to salviarin and gensnerofolin B. The structures were elucidated by spectroscopic and chemical means.
Baldomero Esquivel, Jorge Cardenas, T.P. Ramamoorthy, Lydia Rodriguez-Hahn   +3 more
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5,10-seco-neo-Clerodanes and neo-Clerodanes from Salvia microphylla

Journal of Natural Products, 2014
Two new 5,10-seco-neo-clerodanes, salvimicrophyllins A and B (1 and 2), and two new neo-clerodanes, salvimicrophyllins C and D (3 and 4), were isolated from the leaves and flowers of Salvia microphylla. The structures of these compounds were elucidated mainly by analysis of their NMR spectroscopic and mass spectrometric data.
Elihú, Bautista, Rubén A, Toscano, Alfredo, Ortega   +2 more
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Diterpene Analysis with Emphasis on Clerodanes

1990
Early work on Compositae diterpenes focused on Solidago and the normal-labdane, solidagenone (Figure 33 [pp. 513–514]; Structure 158) (9, 16, 17). Later, ent-clerodanes (kolavanes) were found to co-occur with the labdanes (364, 365). The first identified novel clerodane, solidagonic acid (Figure 33; Structure 500), was shown by chemical interconversion
Fred Seaman, Ferdinand Bohlmann, Christa Zdero, Tom J. Mabry   +3 more
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Clerodane Diterpenoids from Croton crassifolius

Journal of Natural Products, 2012
Seven new clerodane diterpenoids (1-7) were isolated from roots of Croton crassifolius, along with six known compounds. The structures were elucidated by extensive spectroscopic methods (IR, UV, HRESIMS, 1D NMR, and 2D NMR), and the structures of 1, 3, 4, and 7 were confirmed by single-crystal X-ray diffraction analyses.
Wang, Guo-Cai, Li, Jia-Gui, Li, Guo-Qiang, Xu, Jiao-Jiao, Wu, Xia, Ye, Wen-Cai, Li, Yao-Lan   +6 more
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New clerodane diterpenoids from Casearia sylvestris

Fitoterapia, 2009
Two new clerodane diterpenoids 2 beta-methoxy-cleroda-3,13-dien-18-carboxy-15,16-olide (1) and 15 xi-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-
Wei, Wang, Zulfiqar, Ali, Xing-Cong, Li, Troy A, Smillie, De-An, Guo, Ikhlas A, Khan   +5 more
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Clerodane Diterpenes from Tinospora rumphii

Journal of Natural Products, 2000
Two new diterpenes (1 and 2) were obtained from the leaves of Tinospora rumphii, along with the known compounds tinotufolin D and vitexilactone. The structures of compounds 1 and 2 were established on the basis of spectroscopic studies.
C Y, Ragasa, M C, Cruz, R, Gula, J A, Rideout   +3 more
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Neo-clerodane diterpenoids from Croton schiedeanus

Phytochemistry, 2003
Two new neo-clerodane type furano diterpenoids were isolated from the aerial part of Croton schiedeanus, besides the clerodane diterpenes cis- and trans-dehydrocrotonin, previously isolated from other species of Croton. Structural elucidation was achieved on basis of extensive NMR experiments, including X-ray diffraction analysis and molecular ...
Pilar, Puebla, Jose L, López, Mario, Guerrero, Rosalía, Carrón, M Luisa, Martín, Luis, San Román, Arturo, San Feliciano   +6 more
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Neo-clerodane diterpenoids from Baccharis incarum

Phytochemistry, 1985
Abstract A new neo-clerodane diterpenoid was isolated from the aerial parts of Baccharis incarum together with the previously known diterpenoids bacchalineol and barticulidiol.
Arturo Givovich, Aurelio San-Martín, Mariano Castillo   +2 more
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Cytotoxic clerodane diterpenes from Glossocarya calcicola

Phytochemistry, 2005
Three clerodane diterpenes were isolated and identified from leaf extract of Glossocarya calcicola. Compound has been characterised as (rel)-10betaH-trans-12xi-(2-methylbut-2(E)-enoyl)-1beta-(isobutanoyl)-6alpha,13xi-dihydroxyclerodan-4(20),8(18)-dien-7,15-dione-15,16-oxide, to which we have assigned the trivial name calcicolin-A.
Rasikari, Heidi L, Leach, David N, Waterman, Peter G, Spooner-Hart, Robert N, Basta, Albert H, Banbury, Linda K, Winter, Kelly M, Forster, Paul I   +7 more
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