Results 141 to 150 of about 1,096 (185)

Correlation of diterpenes of the (–)-kaurane series and atractyligenin

Australian Journal of Chemistry, 1968
19-Nor-16a- and 19-nor-16ß-(-)-kaurane (11) and (111) have been prepared by unambiguous methods from 16a-( -)-kaurane-3a,l7,19-triol (IV) and (-)-kaur-16-ene-3a,l9-diol (V) and have been identified with samples derived from atractyligenin, thus providing conclusive proof for the skeleton of the latter.
EL Ghisalberti, PR Jefferies, S Passannanti, F Piozzi   +3 more
openaire   +2 more sources

Structure of Kaurane-Type Diterpenes fromParinari spruceiand their Potential Anticancer Activity

Planta Medica, 2004
Twenty-three kaurane-type diterpenes 1 - 23, including twenty new natural products 1 - 20, have been isolated from the leaves of Parinari sprucei and their structures elucidated by spectroscopic and chemical analysis. The isolated compounds were tested for their cytotoxic activity towards a panel of cancer cell lines. Compounds 9 and 10 showed activity
BRACA, ALESSANDRA, ARMENISE A, MORELLI, IVANO, MENDEZ J, MI Q, CHAI HB, SWANSON SM, KINGHORN AD, DE TOMMASI N.   +8 more
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An ent-kaurane from Sideritis huber-morathii

Phytochemistry, 1996
WOS: A1996VW86500030A new ent-kaurane diterpenoid, 3,7,18-triacetyl-foliol, was isolated from Sideritis huber-morathii, together with known diterpenes. Two known ent-kauranoids were found in S. caesarea.
K H C Baser, Maria Luisa Bondi, Maurizio Bruno   +2 more
exaly   +2 more sources

ent-Kaurane diterpenes from the stem bark of Annona vepretorum (Annonaceae) and cytotoxic evaluation

Bioorganic and Medicinal Chemistry Letters, 2014
This work describes a novel ent-kaurane diterpene, ent-3b-hydroxy-kaur-16-en-19-al along with five known ent-kaurane diterpenes, ent-3b,19-dihydroxy-kaur-16-eno, ent-3b-hydroxy-kaur-16-eno, ent-3b-acetoxy-kaur-16-eno, ent-3b-hydroxy-kaurenoic acid and ...
Livia Macedo Dutra, Angelita Nepel, Milena Botelho Pereira Soares   +2 more
exaly   +2 more sources

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HPLC quantitation of kaurane diterpenes in Xylopia species

Fitoterapia, 2001
Xylopia frutescens is a tree native to the Brazilian Amazon whose seeds are rich in kaurenoic acid, a diterpene that showed in vitro activity against Trypanosoma cruzi. Aiming to find out alternative sources for kaurenoic acid, the content of some kaurane diterpenes was evaluated in X. aromatica and X.
A C, de Melo, B B, Cota, A B, de Oliveira, F C, Braga   +3 more
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A new kaurane diterpene dimer from Parinari campestris

Fitoterapia, 2005
A new kaurane diterpene dimer, 15-oxozoapatlin-13alpha-yl-10'alpha,16'alpha-dihydroxy-9'alpha-methyl-20'-nor-kauran-19'-oic acid gamma-lactone-17'-oate (1), together with the known 13-hydroxy-15-oxozoapatlin (2), 10alpha,13alpha,16alpha,17-tetrahydroxy-9alpha-methyl-15-oxo-20-nor-kauran-19-oic acid gamma-lactone (3), 2alpha,10alpha,13alpha,16alpha,17 ...
BRACA, ALESSANDRA, A. F. ABDEL RAZIK, J. MENDEZ, MORELLI, IVANO   +3 more
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Trypanosomicidal Kaurane Diterpenes fromWedelia paludosa

Planta Medica, 1999
The diterpenes ent-kaur-16-en-19-oic acid, ent-kaur-9(11),16(17)-dien-19-oic acid and 3 alpha-angeloiloxy-ent-kaur-16-en-19-oic acid were identified as trypanosomicidal compounds of the ethanolic extract from the aerial parts of Wedelia paludosa D.C.
R, Batista, E, Chiari, A B, de Oliveira
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Bioactive Kaurane Diterpenes and Coumarins from Fortunella margarita.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
A M, el-Shafae, M A, Ibrahim
openaire   +2 more sources

Kauranes and related diterpenes from Adenostemma brasilianum

Phytochemistry, 1996
Aerial parts of Adenostemma brasilianum provided a number of new ent-kauranes oxygenated at C-1 and a modified abietane.
Alicia Bardón, Susana Montanaro, César A.N. Catalán, Jesús G. Díaz, Werner Herz   +4 more
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Kaurane and trachylobane diterpenes from Xylopia aethiopica

Phytochemistry, 1994
Abstract Phytochemical investigation of Xylopia aethiopica (Annonaceae) has resulted in the isolation of two novel diterpenes, 15-oxo-(-)-trachyloban-19-oic acid and (-)-kaur-15-en-17-al-19-oic acid. Also encountered were the known compounds 15-hydroxy-(-)-trachyloban-19-oic acid, 15β-hydroxy-(-)-kaur-16-en-19-oic acid (as an inseperable mixture), 15-
George G. Harrigan, Vanderlan da S.Bolzani, A.A. Leslie Gunatilaka, David G.I. Kingston   +3 more
openaire   +1 more source