Alkamide and Lignan from the Stem Bark of Piper chaba (Piperaceae)

Scopoletin (1) was isolated from the chloroform soluble fraction of a methanol extract of the stem bark of Phyllanthus reticulates (Family: Euphorbiaceae). The petroleum ether, carbon tetrachloride and choloroform soluble fractions of this methanol extract were subjected to antimicrobial screening and brine shrimp lethality bioassay. All of the partitionates showed moderate to strong inhibitory activity to microbial growth while the chloroform soluble fraction showed strongest cytotoxicity having LC50 1.99 ?g/ml. Key words: Phyllanthus reticulates, Euphorbiaceae, Scopoletin, Brine shrimp lethality bioassay, Antimicrobial Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

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Oleanane Glycosides from Eclipta prostrata

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v4i2.211 ◽

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

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Triterpenoids from the Stem Bark of Avicennia officinalis

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v5i1.229 ◽

1970 ◽

Vol 5 (1) ◽

pp. 53-57 ◽

Cited By ~ 11

Author(s):

Md. Enamul Haque ◽

Hussain Uddin Shekhar ◽

Akim Uddin Mohamad ◽

Hafizur Rahman ◽

AKM Mydul Islam ◽

...

Keyword(s):

Thin Layer ◽

Betulinic Acid ◽

Full Text ◽

Spectroscopic Analysis ◽

Ethyl Acetate Extract ◽

Preparative Thin Layer Chromatography ◽

Stem Bark ◽

Phytochemical Investigation ◽

Avicennia Officinalis ◽

Layer Chromatography

The triterpinoids, betulinic acid, lupeol and betulinaldehyde, were isolated from the ethyl acetate extract of the stem bark of Avicennia officinalis (Avicenniaceae) by a combination of column and preparative thin-layer chromatography over silica gel. The structures of these compounds were determined by spectroscopic analysis (UV, IR, 1H NMR, 13CNMR and EIMS). This is the first report of a systematic phytochemical investigation and the presence of these triterpoids from this plant. Key words: Triterpenoid, Avicenniaceae, Betulinic acid, Lupeol and Betulinaldehyde Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

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Phytochemical Studies of Amoora cucullata

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v4i1.203 ◽

1970 ◽

Vol 4 (1) ◽

Cited By ~ 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

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Steriod and Triterpenoid from Anogeissus latifolia

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v6i1.343 ◽

1970 ◽

Vol 6 (1) ◽

pp. 47-50 ◽

Cited By ~ 2

Author(s):

Mohammad S Rahman ◽

Mohammad Z Rahman ◽

ABM Ahad Uddin ◽

Mohammad A Rashid

Keyword(s):

Ethyl Acetate ◽

Key Words ◽

Inhibitory Activity ◽

Full Text ◽

Brine Shrimp ◽

Microbial Growth ◽

Ethyl Acetate Extract ◽

Stem Bark ◽

Disc Diffusion ◽

Antimicrobial Screening

3-?-hydroxy-28-acetyltaraxaren (1) and ?-sitosterol (2) were isolated from an ethyl acetate extract of the stem bark of Anogeissus latifolia. The ethyl acetate and methanol extracts when subjected to antimicrobial screening showed significant inhibitory activity to microbial growth, while the ethyl acetate showed demonstrated significant cytotoxicity to brine shrimp with LC50 of 0.50 ?g/ml. Key words: Anogeissus latifolia, Combretaceae, 3-?-hydroxy-28-acetyltaraxaren, ?-sitosterol, antimicrobial, cytotoxiciy, disc diffusion Dhaka Univ. J. Pharm. Sci. 6(1): 47-50, 2007 (June) The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

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Secondary Metabolites from Sterespermum chelonoides

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v4i1.201 ◽

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

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Triterpenoids from the Stem Bark of Adina cordifolia

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v3i1.189 ◽

1970 ◽

Vol 3 (1) ◽

Author(s):

Md. Enamul Haque ◽

Haseena Parvin ◽

Abdullhel Amin

Keyword(s):

Full Text ◽

Stem Bark

Dhaka Univ. J. Pharm. Sci. Vol.3(1-2) 2004 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

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Oxoaporphinoids and a Benzoic Acid Derivative from Cananga odorata

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v3i1.174 ◽

1970 ◽

Vol 3 (1) ◽

Author(s):

Simin S. Lopa ◽

Golam Sadik ◽

M. Mukhlesur Rahman ◽

Robiul Islam ◽

Proma Khondkar ◽

...

Keyword(s):

Benzoic Acid ◽

Acid Derivative ◽

Full Text ◽

2D Nmr ◽

Stem Bark ◽

Dihydroxybenzoic Acid ◽

Benzoic Acid Derivative ◽

Cananga Odorata

O-methylmoscatoline (1), lirodenine (2) and 3,4 dihydroxybenzoic acid (3) were isolated from the stem bark of Cananga odorata. The structures of compounds were confirmed by a series of 1D and 2D NMR and MS analyses. The chemotaxonomic significance of these compounds has also been discussed. Keywords: Cananga odorata (Ylang ylang); Annonaceae; Aporphinoids; O-methylmoscatoline; Lirodenine; 3,4 dihydroxybenzoic acid; Chemotaxonomy Dhaka Univ. J. Pharm. Sci. Vol.3(1-2) 2004 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

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