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Antioxidant activity of methanolic extracts of four Cirsium species. (A) Trolox equivalent antioxidant capacity (TEAC); (B) the relationship between TEAC and PPGs content. Columns indicate mean ± SD (n = 3). CAH: The aerial part of C. arisanense Kitam. CKH: The aerial part of C. kawakamii Hayata. CJF: The flower part of C. japonicum DC. var. australe Kitam. CH: Cirsii Herba.
