Species of Hypericum accumulate phenolic compounds with the phloroglucinol substitution pattern, and there are many reports of such substances isolated from the aerial parts of the plants. In this study, flowers of plants grown in south Brazil were analyzed by means of HPLC, verifying the presence of benzopyrans in H. polyanthemum and dimeric phloroglucinol derivatives in H. caprifoliatum, H. connatum, H. myrianthum and H. polyanthemum. All flowers presented flavonoids, mainly quercetin derivatives, whereas hypericin and analogues were not detected.
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2.
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3.
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4.
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6.
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7.
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8.
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9.
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10.
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12.
Dall'AgnolR, FerrazA, BernardiAP, AlbringD, NörC, SchapovalEES, von PoserGL. (2005) Bioassay-guided isolation of antimicrobial benzopyrans and phloroglucinol derivatives from Hypericum species. Phytotherapy Research, 19, 291–293.
13.
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20.
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21.
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22.
FerrazA, BordignonS, MansDRA, SchmittAC, RavazolloAP, von PoserG. (2002) Screening for the presence of hypericins in southern Brazilian species of Hypericum (Guttiferae). Pharmaceutical Biology, 40, 294–297.
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26.
NörC. (2006) Análise química e taxonômica de espécies de Hypericum e avaliação da atividade antiangiogênica. Thesis, MSc. Pharmaceutical Sciences, UFRGS;
27.
BernardiAPM. (2007) Análise química, avaliação da atividade antixidante e obtenção de culturas in vitro de espécies de Hypericum nativas do Rio Grande do Sul. Thesis, PhD, Pharmaceutical Sciences, UFRGS.
