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From the 70% ethanol extract of the rhizomes of Cyperus rotundus (CRE), several major constituents including the sesquiterpene derivatives (valencene, nootkatone, and caryophyllene α-oxide), monoterpenes (β-pinene, 1,8-cineole, and limonene) and 4-cymene were isolated and examined for their anti-allergic activity in vitro and in vivo. In rat basophilic leukemia (RBL)-1 cells, the sesquiterpenes strongly...
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