Senyawa Morusin dari Tumbuhan Murbei Hitam (Morus Nigra)

Tumbuhan murbei hitam merupakan salah satu spesies dari genus Morus. Tumbuhan dari genus ini telah dilaporkan kaya akan senyawa turunan fenol seperti flavonoid, 2-arilbenzofuran dan stilben. Dalam rangka pencarian senyawa turunan fenol dari tumbuhan murbei Indonesia maka telah berhasil diisolasi suatu senyawa flavon terprenilasi yaitu morusin dari ekstrak metanol kayu batang murbei hitam (M. nigra). Struktur senyawa tersebut telah ditetapkan berdasarkan data-data spektroskopi yang meliputi spektrum UV dan IR serta membandingkan KLTnya dengan senyawa morusin standar

Aktivitas Sitotoksik Alkaloid Dari Cryptocarya Archboldiana Allen

Cryptocarya is one of the largest genus of Lauraceae and most of the species grow in the tropical rain forests of Asia-Pacific, include in Indonesian forest. Generally Cryptocarya contains alkaloids, 2-piron, and flavonoids as well as has a variety of biological activities. Three alkaloids have been isolated from Cryptocarya archboldiana; boldine, laurolitsine, and reticuline. The molecular structure of all these compounds have been established by spectroscopic analysis (UV, 1H, and 13C NMR) and comparison with the spectral data of compounds that have been reported. The cytotoxic of laurolitsine showed moderate activity, while boldine and reticuline have weak activity against P388 murine leukemia cells. Key words: C. archboldiana, alkaloid, cytotoxic, aporphine, benzylisoquinoline

Resveratrol Oligomers From Dipterocarpus Hasseltii: Cytotoxic Effect and Chemotaxonomic Significance

Two resveratrol tetramers, (-)-vaticanol B and (-)-hopeaphenol, were isolated from acetoneextract of the tree bark of Dipterocarpus hasseltii (Dipterocarpaceae), together with the knownresveratrol trimer, (-)-α-viniferin. The structures of these compounds were established based onspectroscopic evidence, UV, IR,1H-NMR,13C-NMR and determined by comparison with thestandard compounds. The cytotoxic activities of these compounds were evaluated against murineleukaemia P-388 cells. The IC50 values of all compounds were 42.2, 5.0 and 17.5 μg/ml,respectively. In addition, chemotaxonomic significance relationship between Dipterocarpus, Shoreaand Vatica will also be briefly discussed

P-Hydroxybenzoic Acid and Kaempferol From Desmodium Triquetrum

Desmodium triquetrum (Fabaceae) is widely distributed in Indonesia and used as herbal medicines for diuretic, hemorrhoids, tonics, and anti-inflammatory. Two known compounds, p-hydroxybenzoic acid (1) and kaempferol (2), were isolated from the MeOH extract of the leaves of Desmodium triquetrum. The structures of isolated compounds were determined based on 1H and 13C NMR data. The MeOH extract showed very active with 6,5 μg/mL in addition, compound (1) and (2) showed weak cytotoxicity against murine cell leukemia P-388 with IC50 55,0 and 24,7 μg/mL, respectively. Compound (1) was the first reported in this species

Cytotoxic properties of oligostilbenoids from the tree barks of Hopea dryobalanoides

A new modified stilbene dimer, diptoindonesin D (1), was isolated from the acetone extract of the tree bark of Hopea dryobalanoides, together with seven known compounds, parviflorol (2), (Ð)-balanocarpol (3), heimiol A (4), hopeafuran (5), (+)-α-viniferin (6), vaticanol