Two new 5-deoxyflavonoids from Calliandra inermis.
Two new 5-deoxyflavonoids, 7,2',3',4'-tetramethoxyflavone (1) and 7,2',3',4'-tetramethoxyflavanone (2) together with a known flavone 7,4'-dimethoxy-3'-hydroxyflavone (3) were isolated from the whole plant of Calliandra inermis. The structures of these new compounds were elucidated by high resolution electron impact mass spectrometry (HR-EI-MS) and 1D and 2D-NMR spectral studies including 1H-1H correlation spectroscopy (COSY), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and nuclear Overhauser enhancement spectroscopy (NOESY).
Maheswara
Muchchintala
M
Natural Products Division, Department of Chemistry, Sri Venkateswara University, Tirupati, India.
Koteswara Rao
Yerra
Y
Siddaiah
Vidavalur
V
Venkata Rao
Chunduri
C
Somayajulu
Kasi Viswanatham
KV
Tyan Lin
Fu
F
D007887:Fabaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry
D005419:Flavonoids; D010936:Plant Extracts