| Literature DB >> 8534402 |
L Rocha1, A Marston, O Potterat, M A Kaplan, H Stoeckli-Evans, K Hostettmann.
Abstract
Three known phloroglucinols (japonicine A, uliginosin A and isouliginosin B) and a new phloroglucinol (hyperbrasiol A) have been isolated from a petrol extract of the leaves and flowers of Hypericum brasiliense. Their structures were established by spectroscopic methods (UV, DCI-MS, 1H and 13CNMR, including SINEPT, HMBC, HSQC, DQFCOSY experiments). The substitution pattern of hyperbrasilol A was confirmed by X-ray crystallography. All four phloroglucinols were antibacterial against Bacillus subtilis in a TLC bioautographic assay. The flavonoids, kaempferol, luteolin, quercetin, quercitrin, isoquercitrin, hyperoside and guaijaverin, were isolated from a methanol extract of the same organs.Entities:
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Year: 1995 PMID： 8534402 DOI： 10.1016/0031-9422(95)00507-4
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072