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).
Natural Products Division, Department of Chemistry, Sri Venkateswara University, Tirupati, India.
Muchchintala
M
Maheswara
Yerra
Y
Koteswara Rao
Vidavalur
V
Siddaiah
Chunduri
C
Venkata Rao
Kasi Viswanatham
KV
Somayajulu
Fu
F
Tyan Lin
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