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. 2020 Nov 16;105(1):211–224. doi: 10.1007/s00253-020-11006-y

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© The Author(s) 2020

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Fig. 1 — Selected armillyl orsellinate and melleolide structures produced by Armillaria gallica FU02472. The structures differ in the presence/absence or position of the double bond in the six-ring system, the number and position of hydroxyl groups, and modifications of the orsellinic acid side chain such as halogenation