Two 6,7-dioxygenated coumarins from Pterocaulon virgatum von Debenedetti, Silvia L., Nadinic, Elena L., Coussio, Jorge D., De Kimpe, Norbert, Boeykens, Marc

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Tetraoxygenated xanthones from Gentianella florida von Nadinic, E.L, Saavedra, C.L, Di Leo Lira, P, Bandoni, A.L, Debenedetti, S.L

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5-(3-methyl-2-butenyloxy)-6,7-methylenedioxycoumarin, a 5,6,7-trioxygenated coumarin from Pterocaulon virgatum von Debenedetti, S.L. (Universidad de Buenos Aires, Capital Federal, Argentina), Palacios, P.S, Nadinic, E.L, Coussio, J.D, Kimpe, N. de, Boeykens, M, Feneau-Dupont, J, Declercq, J.P

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Purpuraslo, a highly oxygenated coumarin from Pterocaulon purpurascens von Debenedetti, S.L, Nadinic, E.L, Gomez, M.A, Coussio, J.D, Kimpe, N. de, Boeykens, M

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