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Found 3 from your keywords: subject="Asam Ursolat"
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ASETILASI ASAM URSOLAT DAN ISOMERNYA ASAM OLEANOLAT DARI BUAH TEMBESU (Fagrae…
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Samosir, Silvia Natalia

Acetylation reaction upon ursolic acid and its isomer oleanolic acid, which were isolated from tembesu fruit {F. fragrans Roxb\ had been carried out by using tetrahydrofuran (THF), acetic acid anhydride and pyridine. Acetylated compounds, 3-acetyl-urson-12-en-28-oic acid and 3-acetyl-olean-12-en-28-oic acid, are white solid having melting point 190-193°C with 37% yield. Antibacterial activity …

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xvi, 38 hlm.: Ilus., tab.; 28 cm
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Call Number
T709552014
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cover
Sintesis etil 3-etoksi urs-12-en-28-oat [etil 3-etoksi olean-12-en-28-oat] da…
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Heru Dwi Andriyadi

Asam ursolat [asam oleanolat] hasil isolasi dari buah tembesu berhasil diesterifikasi dengan menggunakan SOCl2 dan etanol menghasilkan etil 3-etoksi urs-12-en-28-oat [etil 3-etoksi olean-12-en-28-oat] dengan rendemen 14,01 %. Spektrum LC-MS memberikan puncak [M+Li]+ m/z 519 dan [2M+H]+ m/z 1025. Spektrum proton 1H-NMR menunjukan adanya sinyal pada δH 4,07 dan 1,93 untuk gugus etoksi yang terik…

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xvi, 49 hlm. : ilus
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-
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Oksidasi dan uji aktifitas antibakteri asam ursolat dan isomer nya asam olean…
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Linggar Aprida Ekasari

Telah dilakukan reaksi oksidasi asam ursolat dan isomernya asam oleanolat, yang diisolasi dari buah tembesu (Fragrea fragrans Roxb) dengan menggunakan pereaksi Jones’ (K2Cr2O7, H2SO4, dan aseton). Hasil reaksi diperoleh senyawa asam 3-oxo-urson- 12-en-28-oat [asam 3-oxo-olean-12-en-28-oat] dengan rendemen reaksi 18%. Selanjutnya senyawa hasil oksidasi dilakukan uji aktifitas antibakteri t…

Edition
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ISBN/ISSN
-
Collation
xiii, 41 hlm. : ilus.
Series Title
-
Call Number
571.99307 Lin o 2013
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