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Two new benzoquinone derivatives, bungeiquinone (1) and dihydrobungeiquinone (2), and two known derivatives, 3-hydroxyirisquinone (3) and 3-hydroxydihydroirisquinone (4), were isolated from the roots of Iris bungei. The structures of the new compounds were established on the basis of spectroscopic methods.
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Rahman et al. (2000) studied this question.
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