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Biosynthesis of secalonic acid A. The pathway indicated by a 13C nuclear magnetic resonance study of acetate incorporation

✍ Scribed by Itsuo Kurobane; Leo C. Vining; A.Gavin McInnes; John A. Walter; Jeffrey L.C. Wright

Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
195 KB
Volume
19
Category
Article
ISSN
0040-4039

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✦ Synopsis

Studies on ergochrome biosynthesis with "C-labelled acetate'*' and 14C-and 'H-labelled emodin (2)2,3 are consistent with the pathway octaketide (1) + anthraquinone (2) + benzophenone carboxylic ester (3) + tetrahydroxanthone (4) + ergochrome (e.g. !a-4a), but do not exclude dimerization of ,2 or some related tricarbocyclic intermediate before the xanthone ring is

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