Lanostanes and friedolanostanes from the bark of Garcinia speciosa

Friedolanostanes and Lanostanes from the Leaves of Garcinia hombroniana

“…The crude methanol extract from the leaves of G. hombroniana was separated by chromatographic methods to yield five new triterpenes, garcihombronanes F-J (1)(2)(3)(4)(5), together with nine known compounds: five triterpenes [garcihombronanes B-E (6-9) 1 and methyl (25R)-3 -hydroxy-23-oxo-9,15-lanostadien-26-oate (10) 2 ], two flavonoid glucosides (vitexin 4 and isovitexin 5 ), and two ionone glycosides (blumenol C 9-O--D-apiofuranosyl-(1f6)--Dglucopyranoside 6 and vomifoliol 9-O--D-apiofuranosyl-(1f6)--D-glucopyranoside 7 ). The structures of the new compounds were elucidated by analysis of 1D and 2D NMR spectroscopic data, while the known compounds were identified by comparison of their spectroscopic data, especially 1 H and 13 C NMR data, with those of known compounds.…”

A New Cytotoxic Lanostane Triterpenoid from the Basidiomycete Hebeloma versipelle

“…The obvious correlations between H-3 and H-5 indicated that the stereochemistry at C-3 was proved to be b-OH. The clear correlation between H-24 and H-26 confirmed that the configuration of the double bond (D 24 ) is E [18]. On the basis of evidences mentioned above, the structure of 1 was determined as 24(E)-3b -hydroxylanosta-8,24-dien-26-al-21-oic acid.…”

Antiplasmodial and other constituents from four Indonesian Garcinia spp.

“…The 1 H and 13 C NMR assignments of compound 7 are added as Supplementary Data (Table S1). The absolute configuration at C-25 of the same compound isolated from Garcinia speciosa was established as R by X-ray diffraction (Vieira et al, 2004).…”