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Chains of edge-fused hydrogen-bonded R(3)3(22) rings in 5,3'-dihydroxy-3,6,7,4',5'-pentamethoxyflavone.

Swamy, G Y S K; Ravikumar, K; Sridhar, B; Mahender, I; Srinivas, K V N S.

Acta Crystallogr C ; 62(Pt 8): o495-7, 2006 Aug.

Article in English | MEDLINE | ID: mdl-16891730

Subject(s)

Flavones/chemistry , Flavonoids/chemistry , Cleome/chemistry , Crystallography, X-Ray , Hydrogen Bonding , Molecular Structure

Flavanoids from Caesalpinia pulcherrima.

Srinivas, K V N S; Koteswara Rao, Y; Mahender, I; Das, Biswanath; Rama Krishna, K V S; Hara Kishore, K; Murty, U S N.

Phytochemistry ; 63(7): 789-93, 2003 Aug.

Article in English | MEDLINE | ID: mdl-12877920

ABSTRACT

Two new flavanoids, 5,7-dimethoxy-3',4'-methylenedioxyflavanone and isobonducellin along with 2'-hydroxy-2,3,4',6'-tetramethoxychalcone, 5,7-dimethoxyflavone and bonducellin were isolated from the aerial parts of Caesalpinia pulcherrima. The structures of the compounds were settled mainly by interpretation of their 1D and 2D NMR spectra. Isobonducellin was found to be a homoisoflavanoid containing a cis (Z)-double bond. Antimicrobial activity of the new compounds was evaluated.

Subject(s)

Caesalpinia/chemistry , Flavonoids/isolation & purification , Magnetic Resonance Spectroscopy , Molecular Structure , Plant Components, Aerial/chemistry

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