Results 161 to 170 of about 10,001 (185)

Clerodane diterpenoids from Baccharis articulata

Phytochemistry, 1993
Abstract In addition to the previously known compound,7-oxo-16, 19-dihydroxy-3,4-dehydroclerodan-15,20 diacid-dilactone, two novel clerodane diterpenes have been isolated from the aerial portions of Baccharis articulata , namely, 8β-hydroxy-7-oxo- ent -cleroda-3-en-15,18-diacid-16,19-dilactone and 15,16-epoxy-7α,18-dihydroxy-15-methoxy- ent ...
Jinrui Dai, Rutt Suttisri, Eugenia Bordas, Djaja D. Soejarto, A.Douglas Kinghorn   +4 more
openaire   +1 more source

Clerodane diterpenoids from Tinospora cordifolia

Phytochemistry, 1995
Abstract Tinosponone and tinocordioside have been isolated from the stem of Tinospora cordifolia . The structures were established by spectroscopic studies and chemical correlation.
Rakesh Maurya, Versha Wazir, Anjulika Tyagi, Randhir S. Kapil   +3 more
openaire   +1 more source

Clerodane diterpenoids from Polyalthia longifolia

Phytochemistry, 1988
Abstract Two clerodane type diterpenoids, with antifeedant properties have been isolated from Polyalthia longifolia and identified as 16α-hydroxy-cleroda-3,13(14) Z -dien-15,16-olide and 16-oxo-cleroda-3,13(14) E -dien-15-oic acid on the basis of spectral properties.
Anil P. Phadnis, Sarita A. Patwardhan, Narayandatta N. Dhaneshwar, Sudam S. Tavale, Tayur N. Guru Row   +4 more
openaire   +1 more source

An Enantioselective Route Towards Clerodane Diterpenoids

Tetrahedron Letters, 1991
Abstract The asymmetric synthesis of (8R, 9S, 10S)-9-hydroxymethyl-8,9-dimethylΔ 4 -3-octalone 3e was accomplished starting from a chiral naphthalene derivative; its structure was confirmed by X-ray structural studies.
J. Lejeune, J.Y. Lallemand, T. Prangé, L. Ricard   +3 more
openaire   +1 more source

Clerodane diterpenoids from Croton lechleri

Phytochemistry, 1993
Abstract Further chemical examination of the constituents in the bark of Croton lechleri led to isolation of two new diterpenoidal compounds, korberin A and korberin B. Their structure was elucidated by 1 H and 13 C NMR spectroscopic methods, and they were shown to be diterpenoid lactones with the clerodane skeleton.
Y. Cai, Z.P. Chen, J.D. Phillipson
openaire   +1 more source

neo-Clerodane Diterpenoids from Ajuga bracteosa

Journal of Natural Products, 2011
Different neo-clerodane diterpenoids were isolated from a dichloromethane extract of Ajuga bracteosa depending on the isolation procedure used, owing to the labile nature of these tetrahydrofurofuran derivatives. Under "hydroxyl-free" purification conditions, both clerodin- and dihydroclerodin-type diterpenes were obtained [four new compounds ...
Castro, Amaya, Coll, Josep, Arfan, Mohammad   +2 more
openaire   +3 more sources

Labdane and Clerodane Diterpenoids from Colophospermum mopane

Journal of Natural Products, 2015
Five labdane (1-5), an isolabdane (6), and five clerodane diterpenoids (7-11), were isolated from seeds, husks, and leaves of Colophospermum mopane. Compounds 1-3 and 6-9 are new, and their structures were elucidated by means of physical data analysis (1D and 2D NMR, HRESIMS).
Du, Kun, De Mieri, Maria, Neuburger, Markus, Zietsman, Pieter C., Marston, Andrew, van Vuuren, Sandy F., Ferreira, Daneel, Hamburger, Matthias, van der Westhuizen, Jan H.   +8 more
openaire   +3 more sources

Clerodane diterpenoids

Natural Product Reports, 1992
A T, Merritt, S V, Ley
openaire   +2 more sources

Clerodane diterpenoids from Cyathocalyx zeylanica

Phytochemistry, 1995
Abstract A new clerodane diterpene, 3-hydroxy-cleroda-4(18),13 Z -dien-15-oic acid, been isolated from the stem bark of Cyathocalyx zeylanica along with a known clerodane diterpenoid, 16-acetoxy-cleroda-3,13-dien-15,16-olide. Their structures were determined on the basis of spectral data including 2D NMR spectra and some previous 13 C NMR ...
openaire   +1 more source

Clerodane and 5 10-Seco-Clerodane-Type Diterpenoids From Salvia involucrata

Journal of Molecular Structure, 2021
Sérgio Zamudio, Brenda Y Bedolla-García, Leovigildo Quijano   +2 more
exaly