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organic compounds
The title compound, C22H32O6, is a sesquiterpene isolated from Pluchea carolinensis (Compositae). The X-ray structure is consistent with a compound isolated from other species of Pluchea and elucidated from spectroscopic data [Nakanishi, Crouch, Miura, Dominguez, Zamudio & Villarreal (1974). J. Am. Chem. Soc. 96, 609-611].