Results 141 to 150 of about 1,611 (171)

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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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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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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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
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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
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Frutoic acid, a dimeric kaurane diterpene from Xylopia frutescens

Phytochemistry, 1995
Sitosterol and six diterpenes were isolated from green fruit, stem bark and leaves of Xylopia frutescens and characterized as ent-15α-acetoxy-kaur-16-en-19-oic acid (xylopic acid), ent-kaur-16-en-19-oic acid (kaurenoic acid), ent-16β-hydroxy-kaurane, ent-kaur-16-en-19-ol, ent-16β-hydroxy-kauran-19-oic acid and ent-16β,17-dihydroxy-kauran-19-oic acid ...
Jacqueline A. Takahashi, Maria Amélia D. Boaventura, Joaquim de Carvalho Bayma, Oliveira Alaíde B.   +3 more
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Cytotoxic Trachylobane and Kaurane Diterpenes from Psiadia punctulata

2020
Original NMR data (FIDs).
Yaouba, Souaibou, Valkonen, Arto, von der Heiden, Daniel, Lindblad, Sofia, Coghi, Paolo, Irungu, Beatrice, Midiwo, J. O., Wong, Vincent K. W., Yenesew, Abiy, Erdelyi, Mate   +9 more
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Three new ent-kaurane diterpenes from the herbs of Wedelia prostrata

Journal of Natural Medicines, 2016
Three new ent-kaurane diterpenes, 3α-angeloyloxy-17-hydroxy-ent-kaur-15-en-19-oic acid (1), 3α-tigloyloxy-17-hydroxy-ent-kaur-15-en-19-oic acid (2) and 3α-cinnamoyloxykaur-9(11),16-dien-19-oic acid (3), along with five known compounds (4-8), were isolated from the herbs of Wedelia prostrata (Asteraceae).
Zhongnan, Wu, Yubo, Zhang, Li, Yang, Nenghua, Chen, Lin, Jiang, Siqi, Jiang, Guoqiang, Li, Yaolan, Li, Guocai, Wang   +8 more
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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
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