A new eudesmane derivative from Leontodon tuberosus

Besides the known compounds 2,4,6-trihydroxyacetophenone 4-O-β -D-glucopyranoside and syringaresinol 4'-O-β -D-glucopyranoside, the novel sesquiterpenoid 1,2-dehydro-3-oxocostic acid β -D-glucopyranoside ester was isolated from Leontodon tuberosus L. and its structure established by mass spectrometry and 1D-and 2D-NMR spectroscopy. Additionally, a number of fatty and phenolic acids was identified in the crude methanolic extract by HPLC-DAD and HPLC-MS. The chemosystematic impact of the new sesquiterpenoid is discussed briefly

JSCS–4002 Original scientific paper Rhamnopyranosylvitexin

Abstract: A methanolic extract of Celtis australis leaves yielded 2’’-α-rhamnopyranosylvitexin and 2’’-α-rhamnopyranosyl-7-O-methylvitexin. Both compounds are known from other sources from earlier investigations but the full NMR data for the latter compound are reported for the first time

On the occurrence of sonchuside A in Cicerbita alpina and its chemosystematic significance

The subaerial parts of Cicerbita alpina yielded the guaianolide 8-acetyl-15b-D-glucopyranosyllactucin (1) and the germacranolide Sonchuside A (2). The sonchuside A is reported for the first time from the genus Cicerbita. 1H-NMR and 13C NMR data of compounds 1 and 2 measured in deuterodimethyl sulfoxide and deuteromethanol, respectively, are given and the chemosystematic implications of the occurrence of sonchuside A in C. alpina are discussed briefly

A new trisaccharide derivative from Prenanthes purpurea

A methanolic extract of Prenanthes purpurea L. leaves yielded 1,6"- -di-O-cinnamoyl-β-D-glucopyranosyl-(1→3)-O-α-L-rhamnopyranosyl- (1→6)- -O-β-D-glucopyranoside. The NMR and physical data of this new natural compound are reported.PeerReviewe

Phenolic compounds from Scorzonera tomentosa L.

From the subaerial parts of S. tomentosa L. (Asteraceae), two new dihydroisocoumarins, compounds 1 and 2, a new phthalide, 3, and a new stilbene derivative, 4, were isolated, together with four known compounds, (+/-)-hydrangenol (5), (-)-hydrangenol 4'-O-beta-glucoside (6), (+/-)-hydramacrophyllol A (7), and (+/-)-hydramacrophyllol B (8). All secondary metabolites were identified on the basis of physicochemical, spectroscopic, and mass-spectrometric data. The known compounds 5-8 were isolated for the first time from this species

Diterpenoids and phenolics from pseudopanax simplex

An ethanolic extract of Pseudopanax simplex yielded kaempferol-3,7-di-O-rhamnopyranoside, chlorogenic acid, maltol glucoside, ent-kaur-16-en-18-acid, and 4R,5S,9R,10S,13S-ent-pimara-7,15-dien-19-oic acid. Full NMR data for the last compound are reported for the first time