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  • Title: [Study on chemical constituents from essential oil of Hypericum patulum].
    Author: Zhang LS, Dong GP, Liu GM.
    Journal: Zhong Yao Cai; 2009 Feb; 32(2):224-6. PubMed ID: 19504967.
    Abstract:
    OBJECTIVE: To investigate the chemical constituents from the essential oil of Hypericum patulum, and provide the scientific basis for exploitation. METHODS: The essential oil was extracted by steam distillation. The chemical constituents of the essential oil were analyzed by GC-MS. The relative contents of these constituents were calculated using square peaks to normalization. RESULTS: 72 peaks were separated and 24 constituents were identified, which constituted about 79.50% of the total essential oil. CONCLUSION: The main constituents are alpha-pinene (18.14%), 2,4a,5,6,7,8-hexahydro-3,5,5,9-tetramethyl-,(R)-1H-benzocycloheptene (13.64%), beta-caryophyllene (9.41%), longifolene (6.23%), etc.
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