A New Sesterterpene Tetronic Acid and a Pentaprenylated p-Quinol From an Australian Marine Sponge, Spongia sp.

1992 ◽  
Vol 45 (8) ◽  
pp. 1321 ◽  
Author(s):  
D Lumsdon ◽  
RJ Capon ◽  
SG Thomas ◽  
AA Beveridge
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis ◽  
Tetronic Acid

The sesterterpene tetronic acid (1) and the pentaprenylated p- quinol (2) have been isolated from a specimen of sponge, Spongia sp., collected at a depth of 23 m from Port Phillip Bay, Australia. Structures were assigned on the basis of detailed spectroscopic analysis.

Isopalinurin: a Mild Protein Phosphatase Inhibitor From a Southern Australian Marine Sponge, Dysidea sp.

1993 ◽  
Vol 46 (8) ◽  
pp. 1291 ◽  
Author(s):  
L Murray ◽  
ATR Sim ◽  
JAP Rostas ◽  
RJ Capon
Keyword(s):  
Marine Sponge ◽  
Protein Phosphatase ◽  
Spectroscopic Analysis ◽  
Ethanol Extract ◽  
Antibiotic Activity ◽  
Tetronic Acid ◽  
Phosphatase Inhibitor ◽  
Protein Phosphatase Inhibitor

A new sesterterpene tetronic acid, isopalinurin (1), has been isolated from an Australian marine sponge, Dysidea sp., collected in Bass Strait. Isopalinurin (1) was identified as the agent responsible for the antibiotic activity and protein phosphatase inhibitory properties exhibited by the crude ethanol extract, and its structure was secured by detailed spectroscopic analysis.

Cometins (A-C), New Furanosesterterpenes From an Australian Marine Sponge, Spongia sp.

1992 ◽  
Vol 45 (8) ◽  
pp. 1255 ◽  
Author(s):  
S Urban ◽  
RJ Capon
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis ◽  
Ethanol Extract ◽  
Chemical Derivatization ◽  
Tetronic Acid ◽  
Antibiotic Property ◽  
Great Australian Bight

The known marine furanosesterterpene furospinosulin-1 (1), together with three new furanosesterterpenes, namely cometin-A (2), cometin-B (3) and cometin-C (4), were isolated from a marine sponge, Spongia sp., collected during commercial trawling operations in the Great Australian Bight. The structures of these metabolites were determined by detailed spectroscopic analysis and chemical derivatization . The antibiotic property of the crude ethanol extract of this sponge was attributed solely to the furanosesterterpene tetronic acid cometin -A (2).

A New Sesterterpene Tetronic Acid From an Australian Marine Sponge, Psammocinia sp.

1995 ◽  
Vol 48 (11) ◽  
pp. 1899 ◽  
Author(s):  
L Murray ◽  
H Hamit ◽  
JNA Hooper ◽  
L Hobbs ◽  
RJ Capon
Keyword(s):  
Antimicrobial Activity ◽  
Natural Product ◽  
Marine Sponge ◽  
Spectroscopic Analysis ◽  
Marine Natural Product ◽  
Structural Isomer ◽  
Tetronic Acid ◽  
Spectroscopic Characteristics

A new sesterterpene tetronic acid (5) exhibiting antimicrobial activity has been isolated from an Australian marine sponge, Psammocinia sp., and its structure secured by detailed spectroscopic analysis. The tetronic acid (5) possesses almost identical spectroscopic characteristics to, and is a structural isomer of, the known marine natural product (6) previously reported from an Australian sponge.

scholarly journals New from Old: Thorectandrin Alkaloids in a Southern Australian Marine Sponge, Thorectandra choanoides (CMB-01889)

Marine Drugs ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 97
Author(s):  
Shamsunnahar Khushi ◽  
Angela A. Salim ◽  
Ahmed H. Elbanna ◽  
Laizuman Nahar ◽  
Robert J. Capon
Keyword(s):  
Marine Sponge ◽  
Tissue Specificity ◽  
Spectroscopic Analysis ◽  
Transformation Products ◽  
Chemical Fractionation ◽  
Cancer Tissue ◽  
Michael Acceptor ◽  
Michael Acceptors ◽  
Stable Ring

Thorectandra choanoides (CMB-01889) was prioritized as a source of promising new chemistry from a library of 960 southern Australian marine sponge extracts, using a global natural products social (GNPS) molecular networking approach. The sponge was collected at a depth of 45 m. Chemical fractionation followed by detailed spectroscopic analysis led to the discovery of a new tryptophan-derived alkaloid, thorectandrin A (1), with the GNPS cluster revealing a halo of related alkaloids 1a–1n. In considering biosynthetic origins, we propose that Thorectandrachoanoides (CMB-01889) produces four well-known alkaloids, 6-bromo-1′,8-dihydroaplysinopsin (2), 6-bromoaplysinopsin (3), aplysinopsin (4), and 1′,8-dihydroaplysinopsin (10), all of which are susceptible to processing by a putative indoleamine 2,3-dioxygenase-like (IDO) enzyme to 1a–1n. Where the 1′,8-dihydroalkaloids 2 and 10 are fully transformed to stable ring-opened thorectandrins 1 and 1a–1b, and 1h–1j, respectively, the conjugated precursors 3 and 4 are transformed to highly reactive Michael acceptors that during extraction and handling undergo complete transformation to artifacts 1c–1g, and 1k–1n, respectively. Knowledge of the susceptibility of aplysinopsins as substrates for IDOs, and the relative reactivity of Michael acceptor transformation products, informs our understanding of the pharmaceutical potential of this vintage marine pharmacophore. For example, the cancer tissue specificity of IDOs could be exploited for an immunotherapeutic response, with aplysinopsins transforming in situ to Michael acceptor thorectandrins, which covalently bind and inhibit the enzyme.

scholarly journals Two New Thyminenol Derivatives from the Marine Sponge Haliclona sp

2014 ◽  
Vol 9 (4) ◽  
pp. 1934578X1400900
Author(s):  
Bin Wang ◽  
Yaocai Lin ◽  
Yinning Chen ◽  
Riming Huang
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis

Investigation of the marine sponge Haliclona sp. led to the isolation of two new thyminenol derivatives, named cis-thyminenol (1) and trans-thyminenol (2). The structures of the new isolates were elucidated on the basis of extensive spectroscopic analysis.

A New Furanoditerpene From a Southern Australian Marine Sponge, Thorectandra choanoides

1995 ◽  
Vol 48 (11) ◽  
pp. 1903 ◽  
Author(s):  
S Urban ◽  
RJ Capon
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis

A specimen of the marine sponge Thorectandra choanoides from Bass Strait, Australia, has yielded the new furanoditerpene (7), the structure of which was secured by spectroscopic analysis.

scholarly journals Cytotoxic Polyketides from the Marine Sponge-Derived Fungus Pestalotiopsis heterocornis XWS03F09

Molecules ◽  
2019 ◽  
Vol 24 (14) ◽  
pp. 2655 ◽  
Author(s):  
Lei ◽  
Lei ◽  
Zhou ◽  
Hu ◽  
Niu ◽  
...  
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis ◽  
Fermentation Broth ◽  
Human Cancer ◽  
Optical Rotation ◽  
Cytotoxic Activities ◽  
Human Cancer Cell Lines ◽  
Chemical Structures ◽  
Ic50 Values ◽  
New Compounds

Four new compounds, including two new polyketides, heterocornols M and N (1, 2), and a pair of epimers, heterocornols O and P (3, 4), were isolated from the fermentation broth of the marine sponge-derived fungus Pestalotiopsis heterocornis XWS03F09, together with three known compounds (5–7). The new chemical structures were established on the basis of a spectroscopic analysis, optical rotation, experimental and calculated electronic circular dichroism (ECD). All of the compounds (1–7) were evaluated for their cytotoxic activities, and heterocornols M-P (1–4) exhibited cytotoxicities against four human cancer cell lines with IC50 values of 20.4–94.2 μM.

Norterpene Dienes From an Australian Marine Sponge Latrunculia brevis

1991 ◽  
Vol 44 (1) ◽  
pp. 77 ◽  
Author(s):  
MS Butler ◽  
RJ Capon
Keyword(s):  
Marine Sponge ◽  
Spectroscopic Analysis ◽  
Methyl Esters ◽  
Chemical Derivatization

The norditerpene diene acid (4) and norsesterterpene diene acid (5), along with their corresponding methyl esters (6) and (7), were isolated from an Australian marine sponge, Latrunculia brevis, and their structures determined by detailed spectroscopic analysis, chemical derivatization and degradation. Comment is made on the possible intermediacy of dienes such as (4)-(7) in the biosynthesis of norterpene cyclic peroxides, common to other Latrunculia species from the same locality.

ChemInform Abstract: A New Sesquiterpene Tetronic Acid Derivative from the Marine Sponge Smenospongia sp.

ChemInform ◽  
2010 ◽  
Vol 30 (29) ◽  
pp. no-no
Author(s):  
Marie-Lise Bourguet-Kondracki ◽  
Michele Guyot
Keyword(s):  
Acid Derivative ◽  
Marine Sponge ◽  
Tetronic Acid

Spongiaquinone Revisited: Structural and Stereochemical Studies on Marine Sesquiterpene/Quinones From a Southern Australian Marine Sponge, Spongia sp.

1993 ◽  
Vol 46 (8) ◽  
pp. 1245 ◽  
Author(s):  
RJ Capon ◽  
DR Groves ◽  
S Urban ◽  
RG Watson
Keyword(s):  
Marine Sponge ◽  
Potassium Salt ◽  
Spectroscopic Analysis ◽  
Chemical Investigation ◽  
Chiroptical Properties ◽  
Naturally Occurring ◽  
Great Australian Bight ◽  
Absolute Stereochemistry ◽  
Unambiguous Assignment

A chemical investigation of a large purple sponge, Spongia sp., from the Great Australian Bight, resulted in the isolation of a new sesquiterpene/quinone (8), together with the known compounds dehydrocyclospongiaquinone-1 (4) and spongiaquinone (2). The last compound was also isolated as the potassium salt (9), this being the first recorded account of a naturally occurring marine sesquiterpene/quinone salt. The structure for (8) was assigned by detailed spectroscopic analysis. A re-investigation into the stereostructure of spongiaquinone (2) resulted in the first unambiguous assignment of absolute stereochemistry, and uncovered the peculiar chiroptical properties of spongiaquinone (2) and its potassium salt (9).

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