The oil from inforescences of Hypericum perforatum var. angustifolium growing wild and harvested in Sardinia (Italy) was analyzed by GC and GC/MS. The major compounds in the oil were 2-methyloctane (21.1%), germacrene D (17.6%) and α-pinene (15.8%).
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Pintore et al. (2005) studied this question.
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