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TRIMER RESVERATROL DARI KULIT BATANG SHOREA PARVIFOLIA DYER.

Jurnal Sains dan Terapan Kimia Vol 1, No 1 (2007)
Publisher : Jurnal Sains dan Terapan Kimia

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Abstract

Shorea atau yang dikenal sebagai meranti merupakan genus utama famili Dipterocarpaceae. Masyarakat banyak menggunakan tumbuhan ini sebagai bahan bangunan. Senyawa oligomer resveratrol banyak ditemukan dalam tumbuhan ini berupa dimer, trimer, dan tetramer resveratrol. Beberapa senyawa oligomer resveratrol yang berhasil diisolasi menunjukkan aktivitas biologi yang penting seperti anti-HIV, sitotoksik, anti-jamur, anti-inflamasi, dan anti-bakteri. Pada penelitian ini telah berhasil diisolasi senyawa trimer resveratrol dari ekstrak aseton kulit batang Shorea parvifolia Dyer. Struktur senyawa tersebut ditetapkan berdasarkan berdasarkan data spektroskopi UV, IR, and 1H-NMR.Kata kunci: trimer resveratrol, Shorea parvifolia Dyer., Dipterocarpaceae.

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.

SENYAWA KALKON BARU BERSIFAT ANTI-BAKTERI DARI TUMBUHAN CRYPTOCARYA COSTATA (LAURACEAE)

Berkala Ilmiah MIPA Vol 16, No 1 (2006)
Publisher : FMIPA UGM

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Abstract

Suatu kalkon telah diisolasi dari kulit batang Cryptocarya costata. Isolat diperoleh dari fraksi kloroform, setelah fraksinasi dengan teknik kromatografi yang dilanjutkan dengan rekristalisasi dalam heksana dan etilasetat, dihasilkan kristal jarum berwarna kuning dengan titik leleh 167-169oC. Elusidasi struktur isolat berdasarkan spektrum UV, IR, 1 D dan 2D NMR, maka dapat ditetapkan bahwa senyawa isolat adalah 2’,4’-Dihidroksi-3’,6’-dimetoksicalkon. Uji sitotoksik terhadap E.coli, menunjukkan aktivitas positif dengan nilai hambat 35,4 %, dan pertama kali ditemukan dari tumbuhan Cryptocarya Kata kunci : Kalkon, Sitotoksik, Cryptocarya costata

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.

ISOLASI DAN KARAKTERISASI METABOLIT SEKUNDER DARI EKSTRAK ASETON DAUN MACARANGA PRUINOSA BANGKA BELITUNG

Jurnal Riset Kimia Vol 9, No 2 (2016): March
Publisher : Universitas Andalas

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Abstract

Macaranga is a large genus in Euphorbiaceae, locally known as "Mahang-mahangan", and consisting about 300 species. Distribution of Macaranga is widespread from Africa and Madagascar in the west to the tropical regions of Asia including Indonesia. Based on previous research of the M. pruinosa, secondary metabolites that have been reported are flavonoid, and stilbenoid derivatives from Borneo. M. pruinosa that grow in South Sumatra produce poilanoat acid (diterpene). Therefore, this research is done to investigate phytochemical constituent of leaves of M. pruinosa from Bangka Belitung Islands. Isolation is done by maceration in acetone, separation and purification using vacuum liquid chromatography and radial chromatography. Structure determination were elucidated by 1H-NMR,13C-NMR, 2D NMR. Two compounds are identified as flavanon derivatives. They are nymphaeol B, and 6-farnesil-3',4',5,7-tetrahidroksiflavanon. These compounds are substituted with terphenyl group, known as geranyl (C10), and farnesyl (C15). Nymphaeol B (1) and compound of 6-farnesil-3', 4', 5,7-tetrahidroksiflavanon (2) have been found in other species of Macaranga. In conclusion, we here acquired two phenolic derivatives substituted by terphenyl groups from acetone extracts of leaves of M. pruinosa from Bangka Belitung. They are nymphaeol B, and 6-farnesil-3',4',5,7-tetrahidroksiflavanon. The result showed that M.pruinosa can produce different secondary metabolites depend on where they grow.