Lia D. Juliawaty
Organic Chemistry Division, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia

Published : 5 Documents
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GRANDIFENOL B, SUATU TETRAMER RESVERATROL DARI KULIT BATANG SHOREA PLATYCLADOS (DIPTEROCARPACEAE)

Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 8, No 2 (2006): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

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Abstract

Grandifenol B, suatu tetramer resveratrol yang memiliki unit tetrahidrofuran, telah berhasil diisolasi dari ekstrak aseton kulit batang Shorea platyclados (Dipterocarpaceae). Struktur senyawa ini ditetapkan berdasarkan analisa data spektroskopi UV, IR, NMR 1D dan NMR 2D.  Kata kunci: Dipterocarpaceae, Grandifenol B, Shorea platyclados

Antibacterial Curcuma xanthorrhiza Extract and Fractions

Journal of Mathematical and Fundamental Sciences Vol 46, No 3 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

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Abstract

An acetone extract of Curcuma xanthorrhiza rhizomes and the n-hexane and chloroform fractions obtained from it were tested on eight pathogenic bacteria. The results showed that the acetone extract and the nhexane fraction exhibited significant activities against Bacillus subtilis, Pseudomonas aeruginosa, and Staphylococcus aureus, and weak activities against Shigella dysenteriae and Vibrio cholerae. They were inactive against Escherichia coli, Enterobacter aerogenes and Salmonella thypi, while the chloroform fraction was devoid of activities. NMR analysis disclosed the presence of α-curcumene, xanthorrhizol and an unknown monoterpene in the nhexane fraction. In the chloroform fraction, curcumin was found to be the main compound, together with xanthorrhizol as a minor compound. These results suggest that the antibacterial potency of acetone extract of C. xanthorrhiza is contained in the n-hexane fraction, in which the active constituents are terpenoid compounds. This is the first report of the use of NMR analysis for compound identification contained in an extract or fractions of C. xanthorrhiza.

SENYAWA DIMER DAN TRIMER RESVERATROL DARI KULIT BATANG DIPTEROCARPUS INTRICATUS (DIPTEROCARPACEAE) DAN AKTIVITAS SITOTOKSIKNYA TERHADAP SEL MURIN LEUKIMIA P-388

Alchemy Jurnal Penelitian Kimia Vol 7, No 1 (2008)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Dua senyawa oligomer resveratrol, (-)-?-viniferin (2) dan (-)-?-viniferin (3), bersama-sama satu senyawa turunan asam fenolat, bergenin (1) telah berhasil diisolasi untuk pertama kalinya dari ekstrak aseton kulit batang Dipterocarpus intricatus. Struktur molekul senyawa-senyawa tersebut ditetapkan berdasarkan data spektroskopi UV, IR, 1H-NMR dan 13C-NMR serta perbandingan dengan data sejenis yang telah dilaporkan. Senyawa (-)-?-viniferin (2) dan (-)-?-viniferin (3)menunjukkan aktivitas sitotoksik terhadap sel murin leukemia P-388 dengan nilai IC50 masing-masing sebesar 7,8 dan 17,5 ?g/mL.

AMPELOPSIN A DAN α-VINIFERINDARI KULIT BATANG SHOREA GIBBOSA BRANDIS (DIPTEROCARPACEAE)

Alchemy Jurnal Penelitian Kimia Vol 4, No 2 (2005)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Dua senyawa oligomer resveratrol yaitu (-)-ampelopsin A dan (-)-?-viniferin, telah berhasil diisolasi untuk pertama kalinya dari ekstrak aseton kulit batang Shorea gibbosa. Struktur senyawa ini telah ditetapkan berdasarkan data spektroskopi UV,IR, 1H NMR, 13C NMR serta melalui perbandingan terhadap data senyawa sama yang telah dilaporkan. Pengujian sifat sitotoksikbterhadap dua senyawa oligomer resveratrol tersebut menunjukkan hasil IC50 berturut-turur adalah 17,0 µg.mL-1 ,dan 18,2 µg.mL-1.

Three resveratrol’s oligomers from the stem bark of H. gregaria (dipterocarpaceae) and their toxicity and citotoxicity

INDONESIAN JOURNAL OF PHARMACY Vol 17 No 3, 2006
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

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Abstract

Three resveratrol oligomers have been isolated from the stem bark of H. gregaria including a resveratrol trimer i.e. α-viniferin (1), and two resveratrol tetramers i.e. vaticanol B (2) and hopeaphenol (3). These structures were determined by spectroscopic evidence including UV, IR, 1H , 13C NMR and compared with that of the reported data in the literatures. Activities of the compounds were determined toward brine shrimp Artemia salina (toxicity) and murine leukemia P-388 cells (cytotoxicity). The compound 1 is the most active against A. salina (LC50 = 49,0 ± 5,8 μg/mL), and the compound 3 has very active level toward murine leukemia P-388 cells (LC50 = 5,7 ± 0,3 μM).Key words : Resveratrol oligomers, H. gregaria, toxicity, and cytotoxicity.