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The isolation of acteoside and coniferin from Paulownia tomentosa bark along with the previously reported phenolic glucoside syringin is described. The structure of both, acteoside and coniferin, have been assigned by 'H-and '3C-NMR spectroscopy.

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A new stilbene, 2',3,4',5,5'-pentahydroxy-cis-stilbene (1), along with 13 known compounds, resveratrol (2), oxyresveratrol (3), norartocarpetin (4), kuwanon C (5), morusin (6), cudraflavone A (7), kuwanon G (8), albafurane C (9), mulberrofuran G (10), 3-O-acetyl-α-amyrin (11), 3-O-acetyl-β-amyrin (12) ursolic acid-3-O-acetate (13) and uvaol (14), were isolated from the barks of Morus nigra. Compounds 2, 8, 10, 12 and 14 are reported for the first time from this plant. The isolated compounds were elucidated by means of 1D and 2D NMR, UV, IR and MS, as well as by comparison with the literature data. The isolated compounds and the different extracts were evaluated for their potential antioxidant activity using 2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid)(+) radical-scavenging capacity assay and compared with ascorbic acid. The new stilbene (1) exhibited remarkable antioxidant capacity with IC50 of 4.69 μM.

Loganin (l), loganic acid (2), and periclymenoside (3) have been isolated from Loniceru periclymenum L. The structure of the new compound 3 and the identity of the others have been determined by chemical transformations and interpretation of the spectral data.Introduction. -The genus Lonicera consists of about 180 species of which five are native to Switzerland. In addition, four species and some hybrids are widely cultivated for ornamental purposes or have become locally naturalized [ 11. Earlier investigations on this genus in the field of cyclopentanoid monoterpene glycosides resulted in the isolation and characterization of several iridoids, secoiridoids and three sulfur-containing monoterpene alkaloid glucosides. From the fresh fruits of Lonicera morrowii A. GRAY, the secoiridoid glucosides morroniside and kingiside [2], and from young leaves loniceroside (secologanin) and sweroside [3] have been isolated. Builleul et al. [4] isolated alpigenoside, morroniside and kingiside from the fruits of L. alpigena L. Besides these secoiridoids the isolation of the iridoid glucoside loganin has also been reported for the Lonicera species [5]. Recently, Chaudhuri et al. isolated from L..xylosteum L. three novel sulfur-containing monoterpene alkaloid glucosides, xylostosidine [6] and loxylostosidine A and B [7].

Geraniin and gallic acid were isolated from the alcohol extract of the aerial parts of Erodium glaucophyllum (Geraniaceae). The identity of the compounds was verified through different physical and spectrometric methods. The antibacterial and antifungal activity of geraniin is presented.

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A new phenylpropanoid glycoside, crenatoside, as well as the known phenylpropanoid, acteoside, have been isolated from the aerial parts of Orobanche crenata. Their structures have been determined by spectroscopic methods as well as by means of chemical evidence.