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Ferreira IC, Calhelha RC, Estevinho LM, Queiroz MJ.Ferreira IC, et al. Among authors: calhelha rc.Bioorg Med Chem Lett. 2004 Dec 6;14(23):5831-3. doi: 10.1016/j.bmcl.2004.09.038.Bioorg Med Chem Lett. 2004.PMID: 15501050