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- W2097121998 abstract "Direct testing of14C-labelled aesculetin has yielded results in accord with its previously postulated role as the intermediate between umbelliferone and scopoletin in the biosynthesis of puberulin by A. puberula. Mass spectrometric analysis of an acidic fraction from this species, which should contain all its free phenolic coumarins, indicated the presence of isofraxidin and fraxetin, which was confirmed by GC. [8-O-14Me] Isofraxidin was, on average, utilized comparably to [14Me] scopoletin in puberulin formation, and in two experiments the incorporations of > 1% were among the best that have been observed for any puberulin precursor. Participation of isofraxidin strongly implicates fraxetin as an intermediate. The sequence:p-coumaric acid → → umbelliferone → aesculetin → scopoletin → fraxetin → isofraxidin → puberulin is proposed as a feasible biosynthetic route." @default.
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- W2097121998 date "1988-01-01" @default.
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- W2097121998 title "Intermediates in the formation of puberulin by Agathosma puberula" @default.
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- W2097121998 doi "https://doi.org/10.1016/0031-9422(88)83105-4" @default.
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