Highly hydroxylated triterpenes from Salvia kronenburgii

The three new triterpenes (1-3) and five known triterpenes and a sterol were isolated from the acetone extract of a Turkish collection of Salvia kronenburgii. The structures of the new triterpenes were established as 1beta,2alpha-dihydroxy-3beta-acetoxy-11-oxours-12-ene (1), 2alpha,20beta-dihydroxy-3beta-acetoxyurs-9(11),12-diene (2), and 1beta,2alpha-dihydroxy-3beta-acetoxyurs-9(11),12-diene (3) on the basis of spectral analyses, including 1D and 2D NMR and mass spectroscopy. It is probable that compounds 2 and 3 are artifacts from dehydration of the corresponding allylic alcohols. 1beta,2alpha,3beta,11alpha-Tetrahydroxyurs-12-ene (5), the most abundant compound in the extract, was found to be highly cytotoxic to renal, non-small cell lung, and breast cancer cell lines

BIOACTIVE AND OTHER PIPERIDINE ALKALOIDS FROM CASSIA-LEPTOPHYLLA

Four new piperidine alkaloids, leptophyllin A (4), 3-acetylleptophyllin A (5), leptophyllin B (8), and (-)-spectaline (1), and 3 known piperidine alkaloids, (-)-spectalinine (2), canavaline (3), and iso-6-canavaline (7), were isolated by a bioassay-guided fractionation of a leaf extract of Cassia leptophylla. The alkaloids 1 - 3 were active in a mechanism-based DNA-modifying yeast assay and 2 was moderately active in Vero monkey and Chinese hamster ovary cell cytotoxicity assays

DNA damaging activities of methanol extract of Ajuga postii and iridoid glucoside reptoside

An iridoid glucoside reptoside ( 1) has been isolated as a DNA damaging active agent by bioassay-guided fractionation of the methanol extract of Ajuga postii. Furthermore, from the acetone extract of A. postii two known triterpenic compounds ursolic acid, alpha-amyrin and two steroidal compounds ( 24S)-24-ethylcholesta-5,25-dien-3 beta-ol and beta-sitosterol were isolated. Their structures were elucidated based on 1D and 2D NMR techniques and mass data

A new clerodane diterpene and other constituents from Ajuga chamaepitys ssp laevigata

From Ajuga chamepitys ssp. laevigata, a new clerodane diterpene, ajugalaevigatic acid, has been isolated besides five known compounds, a diterpene, (13S)-15-hydroxylabd-8(17)-en-19-oic acid, a steroidal glucoside, 3-O-beta-D-glucopyranosyl-stigmasta-5,25-diene, and triterpenes, alpha- and beta-amyrin and ursolic acid. Their structural elucidation is based on NMR and MS spectroscopic analyses. For the new compound 2D NMR experiments were carried out. Ajugalaevigatic acid was tested against a panel of cytotoxic cell lines, and only found to be active against the A2780 human ovarian cancer cell line

A New Clerodane Diterpene and Other Constituents from Ajuga chamaepitys ssp. laevigata

From Ajuga chamepitys ssp. laevigata, a new clerodane diterpene, ajugalaevigatic acid, has been isolated besides five known compounds, a diterpene, (13S)-15-hydroxylabd-8(17)-en-19-oic acid, a steroidal glucoside, 3-O-beta-D-glucopyranosyl-stigmasta-5,25-diene, and triterpenes, alpha- and beta-amyrin and ursolic acid. Their structural elucidation is based on NMR and MS spectroscopic analyses. For the new compound 2D NMR experiments were carried out. Ajugalaevigatic acid was tested against a panel of cytotoxic cell lines, and only found to be active against the A2780 human ovarian cancer cell line

Alkaloids and aromatics of Cyathobasis fruticulosa (Bunge) Aellen

A beta-carboline-, a tryptamine-, and two phenylethylamine-derived alkaloids and three known aromatic compounds were isolated from the aerial parts and roots of Cyathobasis fruticulosa (Bunge) Aellen, and their structures were elucidated by spectroscopic techniques. The one new alkaloid, N-methyl-N-formyl-4-hydroxy-beta-phenylethylamine (1), showed marginal antifungal activity

Cytotoxic activity and essential oil composition of leaves and berries of Juniperus excelsa

The composition of the water-distilled essential oils of the berries and leaves of Juniperus excelsa M. Bieb. were analyzed by gas chromatography-mass spectrometry (GCMS). The main components in the berries of J. excelsa, accounting for 56.1% of the oil, were determined as alpha-pinene (34.0%), cedrol (12.3%), L-verbenol (5.4%), and D-verbenol (4.4%) while in the leaves of J. excelsa, accounting for 63.2% of the oil, were found to be alpha-pinen (29.7%), cedrol (25.3%), alpha-muurolene (4.4%), and 3-carene (3.8%). Cytotoxic and antimicrobial potential of the berries and leaves of J. excelsa were investigated

A DNA-damaging sesquiterpene and other constituents from Frullania nisquallensis

Bioassay-guided fractionation of an MeCOEt extract of Frullania nisquallensis Sull. has furnished a DNA-damaging sesquiterpene, costunolide (1), and two inactive compounds, a sesquiterpene (-)-frullanolide (2) and a tridepside tenuiorin (3). C-13-NMR data of 3 are reported