Nauclefolinine: A new alkaloid from the roots of Nauclea latifolia

A novel indole alkaloid, nauclefolinine (1) and five known triterpenic compounds, rotundic acid (2), a-L-rhamnoquinovic acid (3), 3-O-b-D-glucopyranosyl-b-sitosterol (4), squalene (5) and sitosterol-3-O-6’-stearoyl-b-D-glucopyranoside (6) have been isolated from the roots of Nauclea latifolia. KEY WORDS: Nauclea latifolia, Rubiaceae, Indole alkaloid, Triterpenic acids, Rotundic acid, Rhamnoquinovic acid  Bull. Chem. Soc. Ethiop. 2003, 17(2), 173-176

4,5-Epoxide-1,6-dimethyl-1-vinylhexyl p-coumarate: A novel monoterpene derivative from Cleistopholis patens

A novel monoterpene derivative (1) and four known partially and total acetylated tri- and tetrarhamonoside dodecanyl ether derivatives: cleistrioside-2 (2) and cleistrioside-3 (3), cleistetroside-6 (4) and cleistetroside peracetate (5) have been isolated from the fruits of Cleistopholis patens. KEY WORDS: Cleistopholis patens, Annonaceae, Oligosaccharide, Partially acetylated tri- and tetrarhamnoside dodecanyl ether derivatives, Cleistrioside, Cleistetroside, Monoterpene derivative  Bull. Chem. Soc. Ethiop. 2003, 17(2), 177-180

<b>Nauclefolinine: A new alkaloid from the roots of <i>Nauclea latifolia</i></b>

A novel indole alkaloid, nauclefolinine (1) and five known triterpenic compounds, rotundic acid (2), α-L-rhamnoquinovic acid (3), 3-O-β-D-glucopyranosyl-β-sitosterol (4), squalene (5) and sitosterol-3-O-6’-stearoyl-β-D-glucopyranoside (6) have been isolated from the roots of Nauclea latifolia

<b>4,5-Epoxide-1,6-dimethyl-1-vinylhexyl <i>p</i>-coumarate: A novel monoterpene derivative from <i>Cleistopholis patens</i></b>

A novel monoterpene derivative (<b>1</b>) and four known partially and total acetylated tri- and tetrarhamonoside dodecanyl ether derivatives: cleistrioside-2 (<b>2</b>) and cleistrioside-3 (<b>3</b>), cleistetroside-6 (<b>4</b>) and cleistetroside peracetate (<b>5</b>) have been isolated from the fruits of <i>Cleistopholis patens</i>

A new Dieis-Alder-type adduct flavonoid from Dorstenia barteri

A new Dieis-Alder-type adduct, dorstenone (1), was isolated from Dorstenia barteri together with three known fiavonoids, 4,2',4'-trihydoxy-3'- prenylchalcone; 4,2',4'-trihydoxy-3,3'-diprenylchalcone; and 5,7,4'- trihydoxy-8-prenylflavone. The structure of 1 was elucidated using a combination of highfield NMR techniques, particularly, gradient-enhanced HMQC and HMBC

New friedelane triterpenes from Lepidobotrys staudtii

Three new dihydroxy-3-friedelanone triterpenes were isolated from the leaves and the stem bark of the Cameroonian medicinal plant Lepidobotrys staudtii. Structure elucidation by spectroscopic techniques showed that they are 2α,29-dihydroxy-3-friedelanone (1a), 2β,21α-dihydroxy-3-friedelanone (2a) and 6β,21α-dihydroxy-3-friedelanone (3). In addition, the known monohydroxy-3-friedelanones 4, 5, 6 and 7 were obtained

Urea derivatives from Pentadiplandra brazzeana

Four urea derivatives were isolated from the roots of Pentadiplandra brazzeana, and their structures were elucidated by spectroscopic techniques. N-Benzyl-N'-(4-methoxybenzyl)urea (1) is a new compound, although N,N'-di-(4- methoxybenzyl)urea (2), N,N'-dibenzylurea (3), and p-methoxythiobenzaldehyde (4) are reported from a natural source for the first time

4,5-Epoxide-1,6-dimethyl-1-vinylhexyl p-coumarate: A novel monoterpene derivative from Cleistopholis patens

A novel monoterpene derivative (1) and four known partially and total acetylated tri- and tetrarhamonoside dodecanyl ether derivatives: cleistrioside-2 (2) and cleistrioside-3 (3), cleistetroside-6 (4) and cleistetroside peracetate (5) have been isolated from the fruits of Cleistopholis patens

Hosloppin, a new pyrone-substituted flavonoid from hoslundia opposita

Hosloppin [1], a new pyrone-substituted flavonoid, was isolated from the MeOH extract of the leaves of Hoslundia opposita. The structure of 1 was established as 3"-O-demethylhoslundin from an analysis of its spectroscopic data

Geranylated flavonoids from Dorstenia poinsettifolia

Two new geranylated flavonoids, poinsettifolins A and B, were isolated from the extracts of the herb Dorstenia poinsettifolia, and the structures were determined with NMR spectroscopy and mass spectrometry. In addition, the flavone 5,7,4-trihydroxy-8-prenylflavone (licoflavone C), the chalcones 4,2',4'-trihydroxy-3'-prenylchalcone (isobavachalcone) and isobavachromene, the triterpene butyrospermol, and the carotenoid lutein were isolated