scholarly journals Protoflavanones from the Wood Stem of Salvertia convallariodora

2017 ◽  
Vol 12 (4) ◽  
pp. 1934578X1701200
Author(s):  
Mariana L. de Mesquita ◽  
José E. de Paula ◽  
Laila S. Espindola ◽  
Luiz A. L. Soares ◽  
Tania M. G. da Silva ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Phytochemical Analysis ◽  
Brazilian Cerrado ◽  
Stem Wood ◽  
Full Characterization ◽  
Glucosyl Ester ◽  
First Time

Phytochemical analysis of the ethyl acetate extract of stem wood of Salvertia convallariodora A. St.-Hil. (Vochysiaceae), a Brazilian Cerrado species, led to the isolation and full characterization of three new non-aromatic B-ring flavanones (1-3) as well as the terpene mixture of sericic acid (4), 24-hydroxytormentic acid (5), 24-hydroxytormentic acid glucosyl ester (6), and sericoside (7), all identified for the first time from S. convallariodora. The structures of the new flavanones (1-3) were established from IR, LC-PDA-qTOF-MS, and NMR spectral data, including 2D NMR experiments.

scholarly journals CONTRIBUTE TO STUDY ON CHEMICAL CONSTITUENTS OF URENA LOBATA (L.) OF VIETNAM

2019 ◽  
Vol 57 (2) ◽  
pp. 162
Author(s):  
Quan Minh Pham ◽  
Hoai Van Thi Tran ◽  
Lam Tien Do ◽  
Phuong Lan Doan ◽  
Inh Thi Cam ◽  
...  
Keyword(s):  
Mental Disorders ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Chemical Constituents ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Tree Roots ◽  
Chemical Structures ◽  
Phytochemical Investigation ◽  
First Time

Urena lobata L. is used in Vietnamese traditional medicine for the treatment of several diseases. Tree roots are used to treat rheumatism, dysentery, poor digestion, flu, tonsils, malaria, asthma, goiter. Flowers are used to treat chickenpox, fever, and mental disorders. Branches, leaves or whole trees used to treat injuries bruises, rheumatism, mastitis, bites. Phytochemical investigation of the n-hexan and ethyl acetate extract of Urena lobata L. led to the isolation of β-sitosterol (1), β-sitosterol-3-O-β-D-glucopyranoside (2), a-acetylamino-phenylpropyl a-benzoylamino-phenylpropanoate (3), quercetin (4), and trans-tiliroside (5). Their chemical structures were determined by spectroscopic methods including MS, 1D, 2D NMR and comparing with those reported in previous papers. Two compounds 3, 5 were isolated for the first time from Urena lobata plant.

scholarly journals Four Flavan-3-ol Compounds From The Stembark of Chisocheton balansae C.DC. (MELIACEAE)

Molekul ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 9
Author(s):  
Unang Supratman ◽  
Mohamad Fajar ◽  
Supriatno Salam ◽  
Rani Maharani ◽  
Desi Harneti ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
13C Nmr ◽  
Chemical Structure ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Stem Bark ◽  
Spectroscopic Methods ◽  
Endemic Plants ◽  
North Sulawesi ◽  
First Time

Chisocheton balansae C.DC., is one of the Meliaceae family plants which is the endemic plants from Soputan Mountain, North Sulawesi, Indonesia. This study was aimed to determine the chemical structure of flavan-3-ol compounds from ethyl acetate extract of C. balansae C.DC stembark. Dried powder of C. balansae C.DC stem bark was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Four flavan-3-ol compounds, named catechin (1), epicatechin (2), epigallocatechin-3-O-gallate (3), and epicatechin-3-O-gallate (4) were successfully isolated from ethyl acetate extract. The chemical structure of these isolates was determined by spectroscopic methods (1H-NMR, 13C-NMR, DEPT, and 2D-NMR) and comparison with previous reported spectral data. These compounds are first time reported from this plant.

scholarly journals Four flavonols from the seed of Hibiscus sabdariffa. Linn. growing in Binh Thuan Province

2019 ◽  
Vol 22 (4) ◽  
pp. 348-351
Author(s):  
Pham Nguyen Kim Tuyen ◽  
Truong Van Tien ◽  
Tran The Anh Huy ◽  
Nguyen Thi Hoa ◽  
Huynh Bui Linh Chi ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Hibiscus Sabdariffa ◽  
Asian Countries ◽  
Chromatography Analysis ◽  
Liquid Liquid Extraction ◽  
Nmr Data ◽  
First Time ◽  
Layer Chromatography

Introduction: Hibiscus sabdariffa Linn. (Malvaceae) is a medicinal plant popularly distributed in Asian countries. As of 2019, no chemical investigations from the Vietnamese plant were found. This paper reported the isolation and elucidation of compounds isolated from the seeds of Hibiscus sabdariffa Linn. (Malvaceae) growing in Binh Thuan province. Method: The maceration was applied to the seeds of the plant to afford the crude extract which was then fractionated by liquid-liquid extraction to obtain the ethyl acetate extract. The extract was carried out by using normal phase silica gel column chromatography and thin-layer chromatography. Analysis of spectroscopic data including HR-ESI-MS, 1D and 2D-NMR and a comparison of the NMR data with that in the literature led to the structural elucidation of isolated compounds. Results: Four flavonols comprising quercetin 3-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (1), quercetin 3-O-β-D-glucopyranoside (2), quercetin (3) and kaempferol (4) were isolated from the ethyl acetate extract. Conclusions: This is the first time the isolated compounds were found from the seeds of this plant.

scholarly journals Pentacyclic Triterpenoids from Maytenus cuzcoina

2017 ◽  
Vol 12 (5) ◽  
pp. 1934578X1701200
Author(s):  
Carolina P. Reyes ◽  
Ignacio A. Jiménez ◽  
Isabel L. Bazzocchi
Keyword(s):  
2D Nmr ◽  
Bark Extract ◽  
Phytochemical Analysis ◽  
Spectroscopic Methods ◽  
Root Bark ◽  
Pentacyclic Triterpenoids ◽  
Isolation And Characterization ◽  
Nmr Techniques ◽  
First Time

Phytochemical analysis of the root bark extract of Maytenus cuzcoina (Celastraceae) led to the isolation and characterization of sixteen triterpenoids with a 6/6/6/6/6 pentacyclic system, including the new 22α-hydroxy-29-methoxy-3β-tetradecanoate-olean-12-ene, and 3β,24β-epoxy-29-methoxy-2α,3α,6α-trihydroxy- D:A-friedelane that is reported for the first time as a natural product. This is the first instance of the isolation of a tetradecanoate triterpene ester from a Celastraceae species. The structures were elucidated on the basis of spectrometric and spectroscopic methods, including 1D and 2D NMR techniques.

scholarly journals ISOLASI DAN KARAKTERISASI EKSTRAK ETANOL DAUN LEILEM (Clerodendrum minahassae Teijsm dan Binn.) DENGAN METODE SPEKTROFOTOMETRI ISOLATION AND CHARACTERIZATION ETHANOL EXTRACT OF LEILEM LEAVES (Clerodendrum minahassae Teijsm and Binn) WITH METHODS SPECTROPHOTOMETRIC

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Yuri Pratiwi Utami ◽  
Imrawati Imrawati ◽  
Abd Rasyid
Keyword(s):  
Positive Result ◽  
Ethyl Acetate ◽  
Bacterial Cell ◽  
Ethyl Acetate Extract ◽  
Ethanol Extract ◽  
Phytochemical Analysis ◽  
Ftir Analysis ◽  
Isolation And Characterization ◽  
Ft Ir

ISOLASI DAN KARAKTERISASI EKSTRAK ETANOL DAUN LEILEM (Clerodendrum minahassae Teijsm dan Binn.) DENGAN METODE SPEKTROFOTOMETRIISOLATION AND CHARACTERIZATION ETHANOL EXTRACT OF LEILEM LEAVES (Clerodendrum minahassae Teijsm and Binn) WITH METHODS SPECTROPHOTOMETRICYuri Pratiwi Utami1), Imrawati1), Abd.Rasyid.D1)1)Program studi sarjana farmasi, Sekolah Tinggi Ilmu Farmasi MakassarJl. Perintis Kemerdekaan KM.13,7 Daya telp/fax. 0411-583190 Makassar [email protected] leaf (Clerodendrum minahassae Teijsm .And Binn.) have been reported in traditional medicine for the treatment of various deseases such as stomatch ache and ascariasis. In Minahassa, leilem leaf generally consumed as vegetables. The present study revealed that leilem leaf can inhibit the growth of escherhia coli because of the presence of flavonoid that can demage bacterial cell membranes. This study at characterization of isolated compounds from ethanol extract of leilem leaves (Clerodendrum minahassae Teijsm and Binn). Extraction was done maceration using 70% ethanol with the percentage of rendement was 10,19%. The phytochemical analysis of ethanol extract of leilem leaves showed a positive result of alkoloid, flavonoid, streroid and tanin. The ethyl acetate extract was selected and 2 grams of it was taken to continued to second conventional column chromatography and 5 fractions were obtained. Fraction 2 was choosen and continued to preparative and result 2 isolates. Isolate 2 that showed one spot on tlc with rf 0,66. Was continued for spectrofotometri uv-vis and ftir analysis. The spectrophotometer uv-vis maximum wavalength at 269,0 nm and 333,0 nm. The ftir data indicated the presence of functional O-H, C-H, C=C and C-O which is suspected ad flavonoid.Keywords : Isolation, Characterization, leilem leaf (Clerodendrum minahassae Teijsm and Binn)ABSTRAKDaun leilem (Clerodendrum minahassae Teijsm dan Binn.) dilaporkan yaitu sebagai obat tradisional untuk menyembuhkan beberapa penyakit, seperti sakit perut dan Ascariasis. Daun leilem biasanya dikonsumsi sebagai sayuran oleh masyarakat di Minahasa. Penelitian ini bertujuan untuk mengetahui profil (karakter) senyawa yang diisolasi dari ekstrak etanol daun leilem (Clerodendrum minahassae Teijsm dan Binn.) ekstrak diperoleh dari proses maserasi menggunakan pelarut etanol 70% dengan persen rendamen 10,19%. Hasil uji kandungan kimia ekstrak etanol daun leilem positif mengandung alkaloid, flavonoid, steroid dan tanin. Ekstrak etil astetat dipilih dan diambil 2 gram dilanjutkan untuk dilakukan pemisahan menggunakan komatografi kolom konvensional dan menghasilkan 5 fraksi. Fraksi 3 dipilih dilanjutkan kromatografi kolom konvensional kedua dan didapatkan 5 fraksi. Fraksi 2 dipilih dan dilanjutkan ketahapan kromatgrafi lapis tipis preparatif dan menghasilkan 2 isolat. Isolat 2 yang menunjukkan 1 noda tunggal pada profil KLT dengan niliai Rf 0,66 dilanjutkan untuk dianalisis dengan spektofometri UV-Vis dan FT-IR. Hasil analisis spektrofotometri UV-Vis isolat 2 mempunyai serapan maksimal pada panjang gelombang 269,0 nm dan 333,0 nm-1. Data FT-IR menunjukkan adanya gugus fungsi O-H, C-H, C=C dan C-O yang diduga merupakan senyawa flavonoid. Kata kunci: Isolasi, karakteriksasi, Daun Leilem(Clerodendrum minahassae Teijsm and Binn). 

scholarly journals CONTRIBUTE TO STUDY ON CHEMICAL CONSTITUENTS OF DESMODIUM GANGETICUM (L.) DC. OF VIETNAM

2019 ◽  
Vol 57 (1) ◽  
pp. 1
Author(s):  
Le Minh Ha ◽  
Ngo Thi Phuong ◽  
Do Thi Thanh Huyen ◽  
Duong Bich Ngoc ◽  
Nguyen Minh Nguyet ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Nmr Spectra ◽  
Ethyl Acetate Extract ◽  
Chemical Constituents ◽  
2D Nmr ◽  
2D Nmr Spectra ◽  
First Time

From the ethyl acetate extract of the leaves of Desmodium gangeticum collected in Me Linh, Ha Noi, we isolated 5 compounds including luteolin (1), luteolin tetramethyl ether (2),  N,N-dimethyl tetradecane-1-amin (3), D-pinitol (4)  and stigmasterol (5). In which, luteolin (1) was isolated from Desmodium gangeticum for the first time, luteolin tetramethyl ether (2) and  N,N-dimethyl tetradecane-1-amin (3) were first isolated from genus Desmodium. Their structures were determined by 1D and 2D NMR spectra.

Termiglaucescin, a new polyhydroxy triterpene glucoside from Terminalia glaucescens with antioxidant and anti-inflammatory potential

2017 ◽  
Vol 72 (5-6) ◽  
pp. 203-208
Author(s):  
Amadou Dawé ◽  
Benjamin Talom ◽  
Gilbert Deccaux Wabo Fotso Kapche ◽  
Kauser Siddiqui ◽  
Fawai Yakai ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Spectroscopic Data ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Root Bark ◽  
Anti Inflammatory ◽  
First Time

Abstract Termiglaucescin (1), a new triterpene glucoside, has been isolated from the ethyl acetate extract of the root bark of Terminalia glaucescens Planch. ex Benth, together with 11 known compounds, β-D-glucopyranosyl 2α,3β,6β-trihydroxy-23-galloylolean-12-en-28-oate (2), arjunglucoside I (3), sericoside (4), arjungenin (5), sericic acid (6), arjunetin (7), chebuloside II (8), 3,3′,4-tri-O-methylelagic acid (9), 3,3′-di-O-methylelagic acid (10), β-sitosterol (11) and stigmasterol (12). Compounds 2, 3, 7, 8 and 9 are reported from the plant for the first time. The structures of the isolated compounds were characterized by spectroscopic data interpretations, especially 1D and 2D NMR. The triterpenic isolates showed potent antioxidant and anti-inflammatory activities.

scholarly journals Identification and Characterization of α-Glucosidase Inhibition Flavonol Glycosides from Jack Bean (Canavalia ensiformis (L.) DC

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2481
Author(s):  
Anita M. Sutedja ◽  
Emiko Yanase ◽  
Irmanida Batubara ◽  
Dedi Fardiaz ◽  
Hanifah N. Lioe
Keyword(s):  
2D Nmr ◽  
The Other ◽  
Inhibition Activity ◽  
Jack Bean ◽  
Canavalia Ensiformis ◽  
Kaempferol Glycosides ◽  
Uv Visible ◽  
First Time ◽  
Identification And Characterization

Although the intake of jack bean (Canavalia ensiformis (L.) DC.), an underutilized tropical legume, can potentially decrease the risk of several chronic diseases, not much effort has been directed at profiling the polyphenolics contained therein. Hence, this work aimed to identify and quantify the dominant jack bean polyphenolics, which are believed to have antioxidant and other bioactivities. Four major compounds were detected and identified as kaempferol glycosides with three or four glycoside units. Their structures were established based on UV-visible, 1D, 2D NMR, and HR-ESI-MS analyses. Specifically, kaempferol 3-O-α-l-rhamnopyranosyl (1→6)- β-d-glucopyranosyl (1→2)-β-d-galactopyranosyl-7-O-[3-O-o-anisoyl]-α-l-rhamnopyranoside was detected for the first time, while the other three compounds have already been described in plants other than jack bean. This new compound was found to have a higher α-glucosidase inhibition activity compared to acarbose.

scholarly journals A NEW CYTOTOXIC DOLABELLANE FROM THE INDONESIAN SOFT CORAL Anthelia sp.

2013 ◽  
Vol 13 (3) ◽  
pp. 216-220 ◽  
Author(s):  
Anggia Murni ◽  
Novriyandi Hanif ◽  
Junichi Tanaka
Keyword(s):  
Mass Spectrometry ◽  
Drug Development ◽  
Ethyl Acetate ◽  
Spectroscopic Data ◽  
Soft Coral ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Cancer Drug ◽  
Nmr Data ◽  
Anti Cancer

One new dolabellane (1) and two known diterpenoids stolonidiol (2) and clavinflol B (3) have been isolated from the ethyl acetate extract of the Indonesian soft coral Anthelia sp. A new compound 1 exhibited a moderate cytotoxicity against NBT-T2 cells at 10 µg/mL, while known compounds 2 and 3 showed cytotoxicity at 1 and 0.5 µg/mL, respectively. Structure of the new compound 1 was elucidated by interpretation of NMR spectroscopic data (1D and 2D NMR data) and mass spectrometry (ESIMS data) as well as comparison with those of related ones. This finding should be useful for anti cancer drug development of the promising dolabellane-types compound.

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