Croton draco (Euphorbiaceae) from Guadalupe, San José, Costa Rica was collected in July 1992 and phytochemically studied (leaves, seeds, wood, bark, sap and flowers separately). Commonly known compounds such as 1-hydroxyjunenol, p-hydroxybenzaldehyde, p-methoxybenzoic acid, 3,4,5-trimethoxycinnamyl alcohol, the coumarin scopoletin, the nor-terpenoids 9-dehydrovomifoliol and 2,3-dihydrovomifolio...

Laccasc (benzenediol: oxygen oxidoreductase, EC 1.1O.3.2) has been found in some fungal strains belonging to various classes.i) The enzyme generally catalyzes the removal of hydrogen from phenolic hydroxyl groups or aromatic amino groups using molecular oxygcn as a primary electron acceptor to give radicals, which undergo free-radical additions and related reactions to give various products.2-s...

Ti(III),Mn(III) & Co(III) complexes of schiff bases derived from condensation reaction of 3-(2amino-4-thiazolyl)coumarin with 2-hydroxybenzaldehyde,2-hydroxy-3-methoxy benzaldehyde and 2hydroxy-1-napthaldehyde have been prepared and characterised. All the three ligands function as uninegative bidentate coordinating ligands with metal ions through phenolic oxygen and azomethine nitrogen. The com...

1,2-bis-(4-Hydroxy-3-methoxyphenyl)-3-hydroxypropan1-one (evafolin B, 1), 1-(4-hydroxy-3-methoxyphenyl)3-hydroxypropan-1-one (2), were isolated for the first time from the genus Schisandra, along with abscisic acid (3), 4-hydroxybenzaldehyde (4), 4-hydroxybenzoic acid (5), methyl 4-hydroxybenzoate (6), methyl 3,4-dihydroxybenzoate (7), and vanillic acid (8). All the compounds were evaluated for...

G UNNERA PERPENSA L., FAMILY GUNNERAceae, is among the most frequently cited of about 90 species used by South African traditional healers in pregnancy-related medicines. Seven bioactive compounds were isolated from Gunnera perpensa roots, with five of these being novel to the species at the time of identification. These are 3,3’,4’-tri-Omethyl ellagic acid lactone, ellagic acid lactone, 1,1’-b...