From the root hark of Sorocea bonplandii Baillon (Moraceae), collected in Paraguay, two new isoprenylated phenols, sorocenols A (1) and B (2) were isolated along with four known isoprenylated phenols, kuwanon C, artonin D, sorocein B, and kuwanol E. The structures of sorocenols A and B were shown to be 1 and 2, respectively.Sorocenol B (2) is regarded hiogenetically as variation of Diels-Alder type adduct between chalcone derivative and dehydroisoprenylated compound.
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Nomura et al. (1995) studied this question.
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