Erythrina studies. Part 2. Structures of three novel prenylated antibacterial flavanones, sigmoidins A–C, from Erythrina sigmoidea Hua

Structures and In Vitro Antihepatic Fibrosis Activities of Prenylated Dihydrostilbenes and Flavonoids from Glycyrrhiza uralensis Leaves

“…Compounds 4 to 15 (Figure ) were known compounds and identified as α,α′‐dihydro‐3,5,4′‐trihydroxy‐4,3′‐diisopentenylstilbene ( 4 ) (Biondi et al., ), α,α′‐dihydro‐3,5,3′,4′‐tetrahydroxy‐2,5′‐diisopentenylstilbene ( 5 ) (Ye et al., ), 6‐prenyleriodictyol ( 6 ) (Bohlmannet al., ), 5′‐prenyleriodictyol ( 7 ) (Jia, Ma, & Wang, ), 6‐prenylquercetin‐ 3‐Me ether ( 8 ) (Harborne, Greenham, Williams, Eagles, & Markham, ), 5′‐prenylquercetin ( 9 ) (Jia et al., ), 6‐prenylquercetin ( 10 ) (Jia et al., ), 6‐prenylnaringenin ( 11 ) (Komatsu, Yokoe, & Shirataki, ), 3′‐prenylnaringenin ( 12 ) (Nkengfack, Sanson, Tempesta, & Fomum, ), sigmoidin C ( 13 ) (Fomum et al., ), 8‐[(E)‐3‐hydroxymethyl‐2‐butenyl]‐eriodictyol ( 14 ) (Hayashi et al., ), and quercetin‐3‐Me ether ( 15 ) (Guinot et al., ) by comparison of their spectral data with those reported…”

Senegalensein, A Novel Prenylated Flavanone from Erythrina senegalensis

“…As a continuation of a study on the neutral components of the genus Erythrim (1)(2)(3)(4)(5)(6)(7)(8), we now report the isolation and structural elucidation of the novel lupin;f0lia. The spectral data for 1 compares very favorably with that of amoradin, amoradicin, and amoradinin, three prenylated flavanones from A m e b a fruitzcosa ( I I) of similar structure.…”

Flavonoïdes prénylés et perméabilité membranaire

“…Les activites les plus frequemment repertoriees concernent des proprietes protectrices contre des attaques d'insectes (Lincoln, 1980 ;Lincoln et Walla, 1986 ;Roussis et at., 1987), fongiques (Maillard et al, 1989 ;Tahara et al, 1984Tahara et al, , 1994 ou microbiennes (Fukui et al, 1988 ;Fomum et at., 1986 ). Ces proprietes sont Ia traduction d'une certaine toxicite de ces composes.…”