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All Journal VALENSI Jurnal Kimia (Journal of Chemistry) Bionatura Chimica et Natura Acta Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Makara Journal of Science Molekul: Jurnal Ilmiah Kimia

Ace Tatang Hidayat

Departemen Kimia, FMIPA, Universitas Padjadjaran

Author-ID : 454571

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Immunology & microbiology Materials Science & Nanotechnology

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Flavanoids fromthe Stembark of Chisocheton pentandrus(Meliaceae) Supriatno Supriatno; Ace Tatang Hidayat; Kindi Farabi; Fajar Fauzi Abdullah; Nurlelasari Nurlelasari; Tati Herlina; Unang Supratman; Khadijah Awang
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 2, November 2017
Publisher : Syarif Hidayatullah State Islamic University

Two flavanoid compounds, catechin (1) and epicatechin (2), have been isolated from the stembark of Chisocheton pentandrus. The chemical structure of compounds1and2were identified byspectroscopic data including, UV, IR, NMR (1H, 13C, DEPT 135°, HMQC, HMBC, 1H-1H COSY) and MS and by comparing with previously reported spectral data. Compounds 1 and 2, were isolated in this plant for first time and showed no cytotoxic activity against MCF-7 breast cancer cells.

Dammarane-Type Triterpenoids from The Stembark of Aglaia argentea (Meliaceae) Ace Tatang Hidayat; Kindi Farabi; Ida Nur Farida; Kansy Haikal; Nurlelasari Nurlelasari; Desi Harneti Putri Huspa; Rani Maharani; Unang Supratman; Yoshihito Shiono
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 1, Mei 2018
Publisher : Syarif Hidayatullah State Islamic University

Two dammarane-type triterpenoids, 20S,24S-epoxy-3α,25-dihydroxydammarane (1) and 3α-acetyl-20S,24S-epoxy-3α,25-dihydroxydammarane (2), have been isolated from the stembark of Aglaia argentea. The chemical structure of compounds (1 and 2) were identified by spectroscopic evidences including UV, IR, 1D-NMR, 2D-NMR and MS as well as by comparing with previously reported spectral data. Those compounds were isolated from this plant for first time. Compounds (1 and 2) showed cytotoxic activity against P-388 murine leukemia cells with IC50 values of 23.96 and 8.14 mM, respectively.DOI:http://dx.doi.org/10.15408/jkv.v4i1.7065

Solid-phase Synthesis of Tetrapeptide on 2-Chlorotrityl Chloride Resin by Using Benzotriazol-1-yl-oxytripyrrolidinophosphonium Hexafluorophosphate as Coupling Reagent Rani Maharani; Nuruzzahra Ammatillah; Gunawan Gunawan; Ace Tatang Hidayat
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 2, November 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i2.4055

Tetrapeptide, OH-Pro-Ala-Gly-Tyr-NH2, was successfully synthesised on 2-chlorotrityl chloride resin by taking advantage of PyBOP (benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate) as coupling reagent. The selection of the peptide as the target of synthesis was due to its interesting bioactivity as antioxidant. The synthesis was undertaken with Fmoc strategy, where Fmoc-proline was added onto the resin at the first place. It is known from the literature that proline can resist from rasemisation when it was attached on the resin at the first time. Fmoc deprotection step was carried out by employing 20% piperidine in DMF and the reaction mixture was shaken for 30 minutes. Once the proline attached, the next step was to attach amino acids, alanine (Ala), glycine (Gly) and tyrosine(Tyr), subsequently onto the resin until tetrapeptidyl resin was constructed on the resin. Hydroxyl group of Tyr was protected with t-butyl, which is TFA-labiled. Coupling reaction was undertaken by mixing the amino acid and PyBOP in a mixture of dichloromethane and DMF (1:1) and in the presence of basic DIPEA. Resin cleavage step was carried out by using 95% TFA in water, where t-butyl protecting group on the side chain of Tyr was cleaved at the same time. The analytical RP-HPLC of the final product showed a single peak at 21.9 minutes (20-90% of acetonitrile in water with 0.1% of TFA during 30 minutes), indicating that each coupling has given a good coupling performance and resulting in a pure product. The desired product showed the correct molecular weight with m/z 407.2 [M+H]+ and 429.2 [M+Na]. DOI: http://dx.doi.org/10.15408/jkv.v0i0.4055

Sintesis Tetrapeptida PADY menggunakan Metode Fasa Padat dan Aktivitas Antioksidannya Rani Maharani Ph.D; Dadan Sumiarsa; Christina Marpaung; Achmad Zainuddin; Ace Tatang Hidayat; Desi Harneti; Nurlelasari Nurlelasari; Unang Supratman
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 1, May 2019
Publisher : Syarif Hidayatullah State Islamic University

Peptida antioksidan merupakan kelompok peptida yang berperan penting karena dapat menetralkan radikal bebas, sehingga dapat mencegah dan mengobati penyakit kronis. Salah satu senyawa peptida antioksidan alami yang telah ditemukan peneliti sebelumnya adalah senyawa tetrapeptida PAGY (Pro-Ala-Gly-Tyr) yang diisolasi dari gelatin kulit ikan amur sturgeon (Acipenser schrenckii) dan dilaporkan memiliki aktivitas antioksidannya dengan IC50 5.38 mg/mL dalam uji DPPH dan 0,008 mg/mL dalam uji ABTS berturut-turut. Kelompok kami telah berhasil mensintesis PAGY bersama dengan analognya yakni PSGY, PFFY, PAFY, dan PAIY dengan menggunakan metode sintesis peptida fase padat (SPPS). Pengujian aktivitas antioksidan pada senyawa hasil sintesis menunjukkan bahwa PSGY memiliki aktivitas antioksidan lebih baik dari PAGY. Pencarian analog tetrapeptida antioksidan yang lebih baik hingga saat ini masih terus dilakukan. Pada penelitian ini telah berhasil disintesis analog tetrapeptida lainnya PADY (Pro-Ala-Asp-Tyr) dengan metode sintesis peptida fase padat menggunakan strategi Fmoc/t-Bu pada resin 2-klorotritilklorida dilanjutkan dengan pengujian aktivitas antioksidannya. HATU/HOAT digunakan sebagai reagen pengkopling dalam sintesis PADY. Pemurnian krud PADY dilakukan menggunakan RP-HPLC preparatif sehingga diperoleh PADY murni seberat 14.7 mg (12.6%). Penentuan struktur peptida hasil sintesis dianalisis dengan menggunakan spektroskopi 1H-NMR dan TOF-MS. Pada pengujian aktivitas antioksidan dengan metode DPPH, PADY hasil sintesis memberikan nilai IC50 sebesar 1.850 mg/mL, yang mengindikasikan bahwa PADY menunjukkan aktivitas antioksidan yang lebih rendah daripada PAGY hasil sintesis peneliti sebelumnya. Kata kunci: Antioksidan, tetrapeptida, sintesis peptida fase padat. Antioxidant peptide is a class of peptides that play an important in neutralizing free radicals, therefore this compound can be used to prevent and treat chronic diseases. One of the natural antioxidant peptides reported by previous researcher is PAGY (Pro-Ala-Gly-Tyr), which is isolated from amur sturgeon fish (Acipenser schrenckii) gelatin that showed antioxidant activity with IC50 5.38 and 0.008 mg/mL using DPPH and ABTS assay, respectively. Our group has successfully synthesized PAGY, along with its analogues of PSGY, PFFY, PAFY, and PAIY using solid phase peptide synthesis method (SPPS). Antioxidant assay on synthesised compounds showed that PSGY has better antioxidant activity than PAGY. The search on the analogues of the antioxidant tetrapeptide was continued. From this study, a tetrapeptide analogue PADY (Pro-Ala-Asp-Tyr) has been successfully synthesised by solid phase peptide synthesis method with Fmoc/t-Bu strategy on 2-chlorotrityl chloride resin and tested for its antioxidant activity. HATU and HOAt reagents were used as the coupling reagent for the synthesis of PADY. The resulting PADY peptide solid was then purified using preparative RP-HPLC yielding PADY of 14.7 mg (12.6%). Characterisation of the synthesized compound was analysed by 1H-NMR and TOF-MS. On the antioxidant assay using DPPH method, PADY showed IC50 value of 1.850 mg/mLindicating a lower activity than the synthetic PAGY. Keywords: Antioxidant, tetrapeptide, solid phase peptide synthesis (SPPS).

A Nortriterpenoid and Steroid from the Stem Bark of Aglaia angustifolia Miq (Meliaceae) Ricson Pemimpin Hutagaol; Unang Supratman; Ihsan Rahadian; Srikandi Srikandi; Desi Harneti; Ace Tatang Hidayat; Khalijah Awang; Yoshihito shiono
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.23011

A nortriterpenoid, 3-epi-cabraleahydroxylactone (1) and a steroid, stigma-4-en-3-on (2) were isolated from the n-hexane extract of stem bark of Aglaia angustifolia Miq. Compound (2) was isolated for the first time from this Genus. The structure of both compounds were identified by spectroscopic datas including one and two-dimensional NMR as well as infrared spectrum, high-resolution mass spectrometric analysis and by comparing with those spectral data previously.

Co-Authors Achmad Zainuddin Achmad Zainuddin Ade Sholeh Hidayat Andi Rahim Anjari, Intan Hawina Astrid, Dewi Azmi, Mohamad Nurul Christina Marpaung Dadan Sumiarsa Darwati Darwati Darwati Darwati Desi Harnet Desi Harneti Putri Huspa Dessy Yulyani Kurnia Dewa Gede Katja Dewi Astrid DUDI RUNADI Euis Julaeha Fajar Fauzi Abdullah Fajar Fauzi Abdullah Farabi, Kindi Febrianti, Inky Ferry Ferdiansyah Sofian, Ferry Ferdiansyah Gunawan Gunawan Gunawan, Latifah Harizon Harizon Hasbilla, Raihan Fathurrahman Herdanu Rizqullah Hersa Milawati Hersa Milawati Hidayat, Ade Sholeh Hilmayanti, Erina Hutagaol, Ricson Pemimpin Ida Nur Farida Ida Nurfarida Ihsan Rahadian Ika Wiani IMAN PERMANA MAKSUM Iman Permana Maksum Iman Rahayu Inky Febrianti Jamaludin Al-Anshori Kansy Haikal Khadijah Awang Khalijah Awang Khalijah Awang Khalijah Awang Kindi Farabi Kindi Farabi Kindi Farabi Kindi Farabi Kindi Farabi Kindi Farabi Mohamad Fajar Mohamad Nurul Azmi Mohamad Nurul Azmi Muchlis, Handi Nugraha Mulyasari, Rita Mustaqim, Iqbal Wahyu Mustofa, Hidayat Nurul Nadya Thufaila Naini, Al Arofatus Nunung Kurniasih Nur Muhammad Miftah Nurlelasari Nurlelasari Nuruzzahra Ammatillah O. Suprijana - Ponis Tarigan Primahana, Gian Purnama Purnama R. Ukun M.S. Soedjanaatmadja Rachman, Saadah Diana Rani Maharani Rani Maharani Rani Maharani Rani Maharani Rani Maharani Rani Maharani Rani Maharani Rani Maharani Rani Maharani Ricson Pemimpin Hutagaol Rita Mulyasari Rizky Abdulah Ronny Lesmana Rurini Retnowati Saadah Diana Rachman Safriansyah, Wahyu Salam, Supriatno Salam, Supriyanto Sandra Amalia Riyadi Shiono, Yoshihito Siska Mulya Octavia Siska Mulya Octavia Sofa Fajriah Srikandi, Srikandi Supriatno Supriatno Supriyatna, - Susianti, Susianti Tati Herlina TATI NURHAYATI Tjandrawati Mozef Tri Mayanti Tri Mayanti Unang Supratman Winda Sukmawati Yoshihito Shiono Yoshihito Shiono Yoshihito Shiono Yoshihito Shiono Yoshihito shiono

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