Barakol, from the leaves of Cassia siamea, is shown to be a novel dioxaphenalene derivative. A synthesis from 3,5-dihydroxyphenylacetic acid is described.
B. W. Bycroft, A. Hassaniali-Walji, A. W. Johnson and T. J. King, J. Chem. Soc. C, 1970, 1686 DOI: 10.1039/J39700001686
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