5,7,3'-Trihydroxy-6,4',5'-trimethoxyflavone

Nat Prod Commun. 2014 Feb;9(2):163-4.

Further characterization of foliar flavonoids in Crossostephium chinense and their geographic variation.[Pubmed: 24689280]

METHODS AND RESULTS:
Foliar flavonoids of Crossostephium chinense in Japan and Taiwan were isolated and further characterized. Eighteen flavonoid aglycones, luteolin, apigenin, hispidulin, chrysoeriol, 5,7,4'-trihydroxy-6,3',5'-trimethoxyflavone, jaceosidin, cilsimaritin, quercetin 3-methyl ether, axillarin, chrysosplenol-D, cirsiliol, apometzgerin, 5,7,3'-Trihydroxy-6,4',5'-trimethoxyflavone, luteolin 3',4'-dimethyl ether, cirsilineol, eupatilin, nepetin and 5,7,3',4'-tetrahydroxy-6,5'-dimethoxyflavone, were identified by UV, 1H and 13C NMR spectroscopic, LC-MS and HPLC comparisons w ith authentic samples. The compounds existed on the leaf surface. Four flavonoid glycosides, quercetin 3,7-di-O-glucoside, quercetin 3-O-rutinoside, luteolin 7-O-glucoside and apigenin 7-O-rutinoside, were also isolated as the intracellular flavonoids.
CONCLUSIONS:
It was shown by HPLC survey that variation of the species' flavonoids occurs among the collection sites.

Zhong Yao Cai. 2013 May;36(5):752-5.

Chemical constituents from flowers of Gardenia jasminoides.[Pubmed: 24218967]

To study the chemical constituents from flowers of Gardenia jasminoides.
METHODS AND RESULTS:
The compounds were isolated and purified by column chromatography and their structures were elucidated through spectroscopic techniques (NMR) and physicochemical properties.15 compounds were isolated from flowers of G. jasminoides, and identified as 5,7,3'-Trihydroxy-6,4',5'-trimethoxyflavone (1), 5, 7, 3', 5'- tetrahydroxy-6, 4'-dymethoxyflavone (2), kaempferol (3), quercetin (4), 3beta,23- dihydroxyurs-12-en-28-oic acid (5), 3beta,19alpha-dihydroxy-urs-12-en-28-oic acid (6), 3beta,19alpha,23-trihydroxy-urs-12-en-28-oic acid (7), emodin (8), physcion (9), crocin-I (10), beta-daucosterol (11), beta-sitosterol (12), stearic acid (13), palmitic acid (14), oleic acid (15).
CONCLUSIONS:
Compounds 1 - 15 are isolated from flowers of G. jasminoides and compounds 5 and 6 are isolated from genus Gardenia for the first time.