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4(23)-Dihydroroburic Acid from the resin (incense) of Boswellia carterii
Abstract In addition to α- and β-boswellic acids and their acetyl derivatives, 4(23)-dihydroroburic acid (3,4-secours-12-en-3-oic acid) has been isolated from the resin of Boswellia carterii .
Amino acids and low-molecular-weight carbohydrates of some marine red algae
Abstract Amino acids and low-MW carbohydrates of 18 red algae have been analyzed. Several non-protein amino acids have been identified, including pyrrolidine-2,5-dicarboxylic acid ( 3 c) and N
Fasciculatin, a novel sesterterpene from the sponge Ircinia fasciculata
Abstract A new furanosesterterpene, fasciculatin, has been isolated from the sponge Ircinia fasciculata . On the basis of physical and chemical evidence structure I is suggested for fasciculatin.
Axisonitrile-3, axisothiocyanate-3 and axamide-3. Sesquiterpenes with a novel spiro[4,5]decane skeleton from the sponge Axinella cannabina☆
Abstract Axisonitrile-3 from the marine sponge Axinella cannabina has been shown, on the basis of chemical and spectral data and by single-crystal 3-dimensional X-ray diffraction study, to be 1.
New sesquiterpenoids from the sponge axinella cannabina
On the basis of chemical and spectral evidence, the structureIV has been assigned to Axisonitrile-4, an axane-sesquiterpenoid isonitrile, isolated from the spongeAxinella cannabina; in the same
Dammarane triterpenes from the resin of Boswellia freerana
Abstract The resin of Boswellia freerana afforded in addition to the known 3β,20( S )-dihydroxydammar-24-ene, its 3-acetyl derivative and (20 S )-protopanaxadiol, a new triterpene that was
Dictyol A and B, two novel diterpene alcohols from the brown alga Dictyota dichotoma
From the brown alga Dictyota dichotoma, two diterpene alcohols with a hydroazulene skeleton, dictyol A (II) and B (III), have been isolated and their structures determined on the basis of
Minor sesquiterpenoids from the sponge Axinella cannabina
On the basis of chemical and spectral evidence, the structureIV has been assigned to Axisonitrile-4, an axane-sesquiterpenoid isonitrile, isolated from the spongeAxinella cannabina; in the same
Calysterol: A C29 cyclopropene-containing marine sterol from the sponge Calyx nicaensis
Abstract From an extract of Calyx nicaensis calysterol ( 1 ), a new C 29 cyclopropene-containing sterol, has been isolated and its structure elucidated.
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