A new hydroquinone diterpenoid was isolated from Clerodendrum uncinatum SCHINZ (Verbenaceae) by flash chromatography on silica gel. The structure was established as 7,11‐dihydroxy‐3,4,9,11b‐tetramethyl‐1,2,8,9,11b‐pentahydrophenanthro[3,2‐b]furan‐6(2H)‐one by spectroscopic methods and X‐ray analysis. The diterpene was strongly fungitoxic to spores of Cladosporium cucumerinum.
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Dorsaz et al. (1985) studied this question.
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