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Brockmann H, Knobloch G, Plieninger H, Ehl K, Ruppert J, Moscowitz A, Watson CJ. The Absolute Configuration of Natural (-)-Stercobilin and Other Urobilinoid Compounds. Proc. Natl. Acad. Sci. U.S.A. 1971 Sep;68(9):2141–4. doi: 10.1073/pnas.68.9.2141. |