Ritmaleni Ritmaleni
1Pharmaceutical Chemistry Section, Faculty of Pharmacy, Gadjah Mada University, Yogyakarta 55281, Indonesia 2Curcumin Research Center (CRC), Faculty of Pharmacy, Gadjah Mada University, Yogyakarta 55281, Indonesia

Published : 7 Documents

Found 7 Documents

EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Dihydropirimidine  is  a  heterocyclic  compound  which  has  important  pharmacologic  and  therapeutic  activities.  This  compound  can  be  synthesised  by  using Biginelli  reaction  which  involve  three  type  of  starting  materials  and  also  have  been developed  into  different method    of  reaction  condition  and  starting material.  LR 1  (4 phenyl 3,4 dihydro indeno[2�,1�]pyrimidine 2 one)  is  a  derivative  of  dihydropirimidine. This research was aimed to study the effect of catalyst amount in the synthesis of LR 1 in order to reach the optimal yield.  LR 1 can be synthesised form benzaldehyde, urea adn 2 indanone in ethanol and concentrated chloric acid as catalyst for five hours under reflux. The product mixture was then  extracted  and  isolated  by  column  chromatography  preparative.  The melting  point was checked to determine the purity of the product. The structure elucidation was carried out by using spectroscopic method (uv vis, IR, 1H NMR and MS) The result showed that the highest yield of LR 1 was obtained around 15 % when 0.25 %  of chloric acid used as catalyst. The higher the condition of acid in the reaction, the lower the tield of LR 1 obtained.
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 2 No 1 (2014)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Pemanfaatan gliserol dari hasil samping pembuatan biodiesel sudah banyak dilakukan seperti ditransformasi menjadi produk kimia lain yang mempunyai nilai ekonomi lebih tinggi. Pada penelitian ini gliserol tersebut akan dimanfaatkan sebagai bahan baku pada pembuatan obat batuk gliseril guaiakolat (GG). Gliserol murni maupun yang berasal dari minyak jelantah diubah terlebih dahulu menjadi gliseril klorida melalui reaksi klorinasi, yang kemudian bereaksi dengan o-metoksifenol menjadi GG.Hasil reaksi belum memberikan hasil yang optimal sehingga obat batuk GG belum dapat dihasilkan.Kata kunci: gliserol, gliseril klorida, klorinasi, o-metoksifenol, gliseril guaiakolat. ABSTRACT: Conversion of glycerol as by-product from the biodiesel production into some more valuable products have been done by some researchers. In this research, that glycerol will be used as starting material for the production of cough medicine, glyceril guaiacolate (GG). A pure glycerol or one from the biodiesel production based on waste cooking oil were transformed to glyceril chloride firstly, through the chlorination reaction, which then reacted with o-methoxyfenol to form GG. The reaction conditions that have been applied to make the reactions worked well were not got enough. So, the GG was not obtained yet.Keywords: glycerol, glyceril chloride, chlorination,
Cytotoxicity of Tetrahydropentagamavunon-0 (THPGV)-0 and Tetrahydropentagamavunon-1 (THPGV-1) in Several Cancer Cell Lines Ikawati, Muthi; Purwanto, Heri; Imaniyyati, Niar Nurul; Afifah, Anis; Sagiyo, Marrita Langgeng; Yohanes, Jasson; Sismindari, Sismindari; Ritmaleni, Ritmaleni
Indonesian Journal of Pharmacy Vol 29 No 4, 2018
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1198.508 KB) | DOI: 10.14499/indonesianjpharm29iss4pp179


Tetrahydropentagamavunon-0 (THPGV-0) and Tetrahydro-pentagamavunon-1 (THPGV-1), are analogs of a curcumin metabolite, tetrahydrocurcumin, and a derivate of Pentagama-vunon-0 (PGV-0) and Pentagamavunon-1 (PGV-1), respectively.  THPGV-0 and THPGV-1 have been successfully synthesized and are investigated for their anticancer potency.  Cytotoxic assays were performed toward several cancer cell lines to determine values of the IC50 against those cell lines. Assessing cytotoxicity in Vero normal cell line showed the selectivity of those compound.  THPGV-1 showed highest cytotoxic activity in lymphoma Raji cells, a suspension cell line, with an IC50 of 180mM.  Both THPGV-0 and THPGV-1 showed similar potencies in T47D breast cancer cell line with IC50 values of 250-270mM.  Regardless their high selectivity, however, cytotoxic activities of THPGV-0 and THPGV-1 were lower compared to PGV-0 and PGV-1 in HeLa cervical, T47D breast, and WiDr colon cancer cell lines.  Further study using different types of cancer cell lines and confirmation of cell viability by another assays and apoptosis detection may give more benefit. 
SYNTHESIS OF TETRAHYDROHEXAGAMAVUNON-5 AND TETRAHYDROHEXAGAMAVUNON-7 Ritmaleni, Ritmaleni; Praditya, Ian; Wibowo, Haryono; Sardjiman, Sardjiman
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.238 KB) | DOI: 10.14499/indonesianjpharm26iss2pp103


Synthesis of Tetrahydrohexagamavunon-5 (THHGV-5) and Tetrahydrohexagamavunone-7 (THHGV-7) were prepared by catalytic hydrogenation reaction on Hexagamvunon-5 (HGV-5) and Hexagamavunone-7 (HGV-7) by using gas H2 as source of hydrogen gas, Pd/C 10 % as metal catalyst and methanol as solvent at room temperature. The products were characterized by IR Spectroscopy, Gas Chromatography-Mass Spectroscopy (GCMS), 1D-NMR (1H-NMR and 13C-NMR) and 2D-NMR (1H-13C HMQC) Spectroscopy to determine the product structure molecules. According to the data of IR, GC-MS, 1H-NMR, 13C-NMR and 1H-13C HMQC spectra, the products are THHGV-5 and THHGV-7 as white crystalline powders. Key words:Tetrahydrohexagamavunon-5, Tetrahydrohexagamavunone-7, Hexagamvunon-5, Hexagamavunone-7
Reaksi Antara Gliserol dan o-Metoksi Fenol Dalam Suasana Basa dan Asam Sebagai Upaya Pendahuluan Pemanfaatan Gliserol dari Produk Samping Produksi Biodiesel Untuk Pembuatan Obat Batuk Gliseril Guaiakolat Ritmaleni, Ritmaleni
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Volume 1, No. 2, 2013
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Berbagai kondisi reaksi basa dan asam termasuk penggunaan asam Lewis telah diaplikasikan pada reaksi antara gliserol dan o-metoksi fenol sebagai upaya dalam pemanfaatan gliserol dari hasil samping produksi biodiesel berbahan dasar minyak jelantah. Reaksi ini nantinya akan digunakan pada pembuatan obat batuk gliseril guaiakolat. Kondisi reaksi yang dilakukan belum menghasilkan suatu reaksi yang berjalan secara optimal sehingga masih diperlukan penelitian berikutnya. Some reaction conditions in basic and acid including Lewis acid have been applied on the reaction between glycerol and o-methoxy phenol. This study is an attempt to use glycerol as by-product of waste cooking oil-based biodiesel production. This reaction will be applied for synthesizing of cough medicine named glyceryl guaiacolate. Based on the results obtained, the reaction conditions applied were still not fit yet for optimum reactionand need to be found in the further study.
Antituberculosis Activity of Brotowali (Tinospora crispa) Extract and Fractions against Mycobacterium tuberculosis using Microplate Alamar Blue Assay Method Wahyuningrum, Retno; Ritmaleni, Ritmaleni; Irianti, Tatang; Wahyuono, Subagus; Kaneko, Takushi; Nuryastuti, Titik
Majalah Obat Tradisional Vol 22, No 2 (2017)
Publisher : Faculty of Pharmacy, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.582 KB) | DOI: 10.22146/tradmedj.27925


Tuberculosis (TB), in which caused by pathogenic bacteria, Mycobacterium tuberculosis, has become the major causes of death among all of infectious diseases. The increasing incidence of multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB) has created a need to discover a new antituberculosis drug candidate. The aim of this study was to screen extract and fractions of Tinospora crispa for activity against Mycobacterium tuberculosis H37Rv using the Microplate Alamar Blue Assay (MABA) method. T. crispa extract was prepared by maceration in ethanol (96%) and antituberculosis activity was carried out using MABA method. The result of this study showed that ethanolic extract of T. crispa exhibit antituberculosis activity with minimum inhibition concentration of 12.5 mg/ml.
Indonesian Journal of Chemistry Vol 10, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.973 KB) | DOI: 10.22146/ijc.21486


In view of health, cholesterol is believed as one of many sources can raise several diseases. Hence, both of research in quantification and developing simple, rapid and accurate analysis method of cholesterol in a sample is very important. Aim of this research was to investigate cholesterol oxidation kinetics and its quantification method based on oxidation of cholesterol and formation complex compound of hexathiocyanato ferat(III), {Fe(SCN)6}-3. The kinetics analysis and quantification, involved cholesterol oxidation in 0.1 M and pH 7.0 phosphate buffer solution to produce cholest-4-en-3-one and hydrogen peroxide, in the presence of cholesterol oxidase enzyme. The formed hydrogen peroxide was used to oxidize iron(II) ion, which was reacted furthermore with thiocyanate ion to raise the red-brown complex compound. Results of the study showed that the complex was stable at 10-120 min since the reaction was started, with maximum wavelength of 530-540 nm. While the kinetics analysis gave first order oxidation reaction with a reaction rate constant, kapp = 5.22 x 10-2 min-1. Based on this kinetics data, cholesterol analysis method could be developed i.e. by oxidizing cholesterol within 1.5 h using cholesterol oxidase as a catalyst, and then reacted with Fe2+, in a solution containing thiocyanate ion. Absorbencies of solutions of the complex compound, measured at wavelength of 535 nm, were linearly proportional to their cholesterol concentrations, in the range of 50-450 ppm.   Keywords: cholesterol, quantification, kinetics, hexathiocyanato ferat(III)