scholarly journals 7-Methoxy-8-Prenylated Coumarins from Murraya koenigii (Linn.) Spreng.

2017 ◽  
Vol 15 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Md Mubarak Hossain ◽  
Faiza Tahia ◽  
Md Abdullah Al Mansur ◽  
Mohammad A Rashid
Keyword(s):  
High Field ◽  
Methanol Extract ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Published Data ◽  
Coumarin Derivatives ◽  
Murraya Koenigii ◽  
First Report ◽  
Meranzin Hydrate

Four coumarin derivatives were isolated from the methanol extract of stem bark of Murraya koenigii (Linn.) Spreng. Extensive spectroscopic studies, including high field NMR analyses allowed to identify these compounds as meranzin hydrate (1), epoxyosthol (2), isomeranzin (3) and murracarpin (4). The identity of the compounds was confirmed by comparison with published data as well as co-TLC with authentic samples. This is the first report of occurrence of meranzin hydrate (1), epoxyosthol (2) and isomeranzin (3) from M. koenigii.Dhaka Univ. J. Pharm. Sci. 15(2): 155-159, 2016 (December)

scholarly journals Alkaloids, Coumarin and Cinnamic Acid Derivative from Murraya koenigii (Linn.) Spreng.

2015 ◽  
Vol 14 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Faiza Tahia ◽  
Md Al Amin Sikder ◽  
Mohammad Rashedul Haque ◽  
Jamil A Shilpi ◽  
Khalijah Awang ◽  
...  
Keyword(s):  
Ferulic Acid ◽  
Acid Derivative ◽  
Cinnamic Acid ◽  
High Field ◽  
Methanol Extract ◽  
Spectroscopic Studies ◽  
Nmr Analysis ◽  
Murraya Koenigii ◽  
Cinnamic Acid Derivative ◽  
First Report

A total of seven compounds were isolated from the methanol extract of leaves of Murraya koenigii (Linn.) Spreng. The isolated compounds were characterized as arborinine (1), ferulic acid (2), umbelliferone (3), mahanimbine (4), koenimbine (5), koenidine (6) and O-demethyl murrayanine (7) by extensive spectroscopic studies, including high field NMR analysis as well as co-TLC with authentic samples, whenever possible. This is the first report of occurrence of arborinine (1) and ferulic acid (2) from Murraya species.Dhaka Univ. J. Pharm. Sci. 14(1): 29-33, 2015 (June)

scholarly journals Terpenoids and Coumarin from Bursera serrata Wall.

1970 ◽  
Vol 8 (2) ◽  
pp. 107-110 ◽  
Author(s):  
Kulsum Ara ◽  
Mohammad S Rahman ◽  
AHMM Rahman ◽  
Choudhury M Hasan ◽  
Mohammad A Rashid
Keyword(s):  
Antimicrobial Activity ◽  
Petroleum Ether ◽  
Key Words ◽  
Plant Species ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Published Data ◽  
First Report

Two terpenoids, β-amyrin (1) and β-sitostenone (2) and a coumarin, scopoletin (3) were isolated from petroleum ether and dichloromethane soluble extracts of the stem bark of Bursera serrata Wall. The structures of the isolated compounds 1-3 were established by extensive spectroscopic studies as well as by comparison with published data. Although compounds 1-3 have been isolated from various plant species previously, this is the first report of the occurrence of these compounds from B. serrata. The crude extractives exhibited weak antimicrobial activity and cytotoxicity. Key words: Bursera serrata; Burseraceae; β-amyrin; β-sitostenone; scopoletin; antimicrobial; cytotoxicity   DOI: 10.3329/dujps.v8i2.6023 Dhaka Univ. J. Pharm. Sci. 8(2): 107-110, 2009 (December)

Phytochemical Studies of Amoora cucullata

1970 ◽  
Vol 4 (1) ◽  
Author(s):  
Mohammad S Rahman ◽  
Rasheduzzaman Chowdhury ◽  
Bilkis Begum ◽  
Khondaker M Rahman ◽  
Mohammad A Rashid
Keyword(s):  
Key Words ◽  
Caffeic Acid ◽  
Betulinic Acid ◽  
Full Text ◽  
High Field ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Hexane Extract ◽  
First Report ◽  
Phytochemical Studies

Five compounds were isolated from a hexane extract of the stem bark of Amoora cucullata. The structures of the isolated compounds were established as fridelin (1), stigmasterol, β-sitosterol, betulinic acid (2) and caffeic acid (3) by extensive spectroscopic studies, including high field NMR and MS analyses. This is the first report of occurrence of these compounds from A. cucullata. Key words: Amoora cucullata, Meliaceae, Fridelin, Betulinic acid, Caffeic acid, β-Sitosterol, Stigmasterol Dhaka Univ. J. Pharm. Sci. Vol.4(1) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals Secondary Metabolites from Sterespermum chelonoides

1970 ◽  
Vol 4 (1) ◽  
Author(s):  
Mohammad R Haque ◽  
Khondaker M Rahman ◽  
Bilkis Begum ◽  
Choudhury M Hasan ◽  
Mohammad A Rashid
Keyword(s):  
Secondary Metabolites ◽  
Key Words ◽  
Full Text ◽  
High Field ◽  
Methanolic Extract ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
First Report

Five compounds namely, sterekunthal B (1), sterequinone C (2), p-hydroxybenzaldehyde (3), p-hydroxyphenylmethyl ketone (4) and stigmasterol (5) were isolated from methanolic extract of the stem bark of Stereospermum chelonoides. The structures of compounds 1-5 were established by extensive spectroscopic studies, notably high field NMR and MS. This is the first report of occurrence of 1-5 from Stereospermum chelonoides. Key words: Stereospermum chelonoides, Bignoniaceae, Sterekunthal B, Sterequinone C Dhaka Univ. J. Pharm. Sci. Vol.4(1) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals Alkaloid, Sterol and Triterpenoids from Glycosmis pentaphylla (Retz.) DC

2015 ◽  
Vol 13 (2) ◽  
pp. 115-118 ◽  
Author(s):  
Iftekhar Ahmed ◽  
Ridwan Islam ◽  
Md Al Amin Sikder ◽  
Mohammad Rashedul Haque ◽  
Md Abdullah Al Mansur ◽  
...  
Keyword(s):  
Oleanolic Acid ◽  
High Field ◽  
Methanol Extract ◽  
Spectroscopic Studies ◽  
First Report

Four compounds were isolated from the methanol extract of leaves of Glycosmis pentaphylla. The structures of the isolated compounds were solved as epi-oleanolic acid (1), ?-amyrin (2), spinasterol (3) and arborinine (4) by extensive spectroscopic studies, including high field NMR analyses as well as co-TLC with authentic samples. This appeares to be the first report of their occurrence from Glycosmis species. DOI: http://dx.doi.org/10.3329/dujps.v13i2.21887 Dhaka Univ. J. Pharm. Sci. 13(2): 115-118, 2014 (December)

scholarly journals GALLIC ACID: A PHENOLIC ACID AND ITS ANTIOXIDANT ACTIVITY FROM STEM BARK OF CHLOROFORM EXTRACTS OF SYZYGIUM LITORALE (BLUME) AMSHOFF (MYRTACEAE)

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 180 ◽  
Author(s):  
Tukiran Tukiran ◽  
Fitriyatul Mahmudah ◽  
Nurul Hidayati ◽  
Kuniyoshi Shimizu
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Phenolic Acid ◽  
Methanol Extract ◽  
Authentic Sample ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Chloroform Fraction ◽  
Ic50 Value ◽  
Isolated Compound

A phenolic acid had been isolated from chloroform soluble fractions of a methanol extract of stem bark of Syzygium litorale, Fam. Myrtaceae. The structure of the isolated compound was elucidated and established as gallic acid through extensive spectroscopic studies (UV-Vis, FTIR, and NMR) and by comparison with literature data and authentic sample. This is the first report of the isolation of compound from this plant, although it has previously been found in Myrtaceae family such as S. aromaticum, S. cumini, S. polyanthum, S. cordatum, etc. The chloroform fraction, isolated compound, and vitamin C showed very strong antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) with IC50 value of 23.2, 7.5, and 12.5 mg/mL, respectively.

scholarly journals Phytochemical and Biological Investigations of Eurya acuminata (Theaceae)

2017 ◽  
Vol 15 (2) ◽  
pp. 151-154 ◽  
Author(s):  
Tahmid Faisal ◽  
Monira Ahsan ◽  
Jakir Ahmed Choudhury ◽  
ATM Zafrul Azam
Keyword(s):  
Brine Shrimp ◽  
High Field ◽  
Methanol Extract ◽  
Methanolic Extract ◽  
Antimicrobial Properties ◽  
Spectroscopic Studies ◽  
Vincristine Sulfate ◽  
Thrombolytic Activity ◽  
Aqueous Fraction ◽  
Lc50 Value

The methanol extract of the powdered leaf of Eurya acuminata was investigated for isolation of secondary metabolites and two compounds were obtained by using VLC, column chromatography and TLC. The compounds were identified as phytol (1) and ?-sitosterol by extensive spectroscopic studies, including high field NMR analyses as well as co-TLC with authentic samples. The methanol extract of leaf of E. acuminata and its organic and aqueous soluble partitioning materials were evaluated for cytotoxic, thrombolytic and antimicrobial properties. In the cytotoxicity study the aqueous fraction of crude methanolic extract showed significant lethality towards brine shrimp having LC50 value 8.821 ?g/ml as compared to standard vincristine sulfate (0.404 ?g/ml). In the study for thrombolytic property, different extract of E. acuminata exhibited various thrombolytic activity ranging from 13.66 to 31.89 % as compared to standard streptokinase (46.51 %). No antimicrobial activity was observed from leaf extracts.Dhaka Univ. J. Pharm. Sci. 15(2): 151-154, 2016 (December)

Oleanane Glycosides from Eclipta prostrata

1970 ◽  
Vol 4 (2) ◽  
Author(s):  
Mohammad S Rahman ◽  
Rasheduzzaman Chowdhury ◽  
Chodhury M Hasan ◽  
Mohammad A Rashid
Keyword(s):  
Key Words ◽  
13C Nmr ◽  
Full Text ◽  
High Field ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Hexane Extract ◽  
Nmr Data ◽  
Eclipta Prostrata ◽  
First Time

Two oleanane-type glycosides eclalbasaponin II (1) and eclalbasaponin I (2) along with the ubiquitous steroid, stigmasterol were isolated from an n-hexane extract of the stem bark of Eclipta prostrata. The structures of the isolated compounds were confirmed by extensive spectroscopic studies, notably high field NMR and MS. The 13C NMR data of the parent saponins 1 and 2 are reported here for the first time. Key words: Eclipta prostrata, Compositae, Oleanane glycoside, Eclalbasaponin I, Eclalbasaponin II. Dhaka Univ. J. Pharm. Sci. Vol.4(2) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals A Novel Iridoid from Plumeria Obtusa

2008 ◽  
Vol 3 (2) ◽  
pp. 1934578X0800300
Author(s):  
Firdous Imran Ali ◽  
Imran Ali Hashmi ◽  
Bina Shaheen Siddiqui
Keyword(s):  
Natural Product ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Chemical Transformations ◽  
Compound Identification ◽  
Synthetic Compound ◽  
First Report ◽  
Isolation And Characterization

Phytochemical investigations of fresh leaves and stem bark of Plumeria obtusa Linn. have led to the isolation and characterization of a new iridoid, p-methoxy- E-cinnamoyloxy plumieride (1), to which the trivial name champalinin has been assigned, and a triterpene lactone, 3β-hydroxy-urs-12-one-13β,28-olide (2). This is the first report of compound 2 as a natural product, although it has been reported earlier as a synthetic compound. Identification of these compounds was achieved through spectroscopic studies and chemical transformations.

scholarly journals Sterol and triterpenoids from Hygrophila schulli Buch.-Ham.

2018 ◽  
Vol 44 (2) ◽  
pp. 319-321
Author(s):  
Md Abu Suflan ◽  
Fatema Begum ◽  
Mohammad Rashedul Haque ◽  
Choudhury Mamood Hasan ◽  
Mohammad Abdur Rashid
Keyword(s):  
1H Nmr ◽  
Chromatographic Separation ◽  
Methanol Extract ◽  
Chemical Constituents ◽  
Published Data ◽  
Separation And Purification ◽  
First Report ◽  
Spectral Evidence ◽  
Whole Plants

The methanol extract of whole plants of Hygrophila schulli Buch.-Ham. was subjected to repeated chromatographic separation and purification processes to isolate its chemical constituents. A total of three compounds were isolated which have been characterized as stigmasterol, lupeol and lup-20(29)-ene-3β,23- diol on the basis of 1H NMR spectral evidence and confirmed by comparing with published data, as well as co-TLC in case of stigmasterol and lupeol. This is the first report of lup-20(29)-ene-3β,23-diol from this plant.

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