Two pigments, stenocarpoquinone-A and -B, isolated from the wood of Stenocarpus salignus R.Br., are shown to be (R)-3?-hydroxy-ß-lapachone (1) and 4?-hydroxy-iso-a-lapachone (2), respectively. No pigments could be obtained from the wood of Stenocarpus sinuatus Endl.
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Mock et al. (1973) studied this question.
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