Sandaracopimaric acid has been shown to be 7-epipimara-8(14), 18-dienoic acid (II), and Ukita's acid to be 7-epi-13β-pimara-9(14),18-dienoic acid (VI). A hydroxyl-containing acid from Sandarac resin is described.
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Edwards et al. (1960) studied this question.
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