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Title: Three new 12-carbamoylated streptothricins from Streptomyces sp. I08A 1776. Author: Gan M, Zheng X, Liu Y, Guan Y, Xiao C. Journal: Bioorg Med Chem Lett; 2012 Oct 01; 22(19):6151-4. PubMed ID: 22939698. Abstract: Two new streptothricins (1 and 2) and a new streptothricin acid derivative (3), all with the carbamoyl group substituted at C-12 of the gulosamine moiety, together with the known N(β)-acetylstreptothricin D acid (4), have been isolated from the culture broth of Streptomyces sp. I08A 1776. The structures of the new compounds were determined by MS, CD, and 1D and 2D NMR spectroscopic data analysis. The isolated compounds were evaluated for antibacterial and antifungal activities. Streptothricin E (6) showed potent activity against the clinically isolated extensively drug-resistant Mycobacterium tuberculosis with MIC values of 0.25-0.5μg/mL.[Abstract] [Full Text] [Related] [New Search]