tan-1057 c tan-1057 c tan-1057 c and tan-1057 d are organic compounds found in the flexibacter sp. pk-74 bacterium. tan-1057 c and d are closely related structurally as diastereomers. also related are tan-1057 a and tan-1057 b, isolated from the same bacteria. the four compounds have been shown to be an effective antibiotics against methicillin-resistant strains of staphylococcus aureus which act through the inhibition of protein biosynthesis. tan-1057 c and tan-1057 d tan-1057 c tan-1057 d identifiers cas number 128126-46-5 (tan-1057 c) n128126-47-6 (tan-1057 d) n 3d model (jsmol) interactive image chemspider 7851330 y pubchem cid 9576889 unii 7twx2v5p6q y comptox dashboard (epa) dtxsid90155816 inchi inchi=1s/c13h25n9o3/c1-22-9(6-19-20-7-18-13(16)25)11(24)21-8(5-10(22)23)3-2-4-17-12(14)15/h7-9,19h,2-6h2,1h3,(h,21,24)(h4,14,15,17)(h3,16,18,20,25)/t8-,9+/m0/s1 ykey: pnffupqadhhlmn-dtwkunhwsa-n yinchi=1/c13h25n9o3/c1-22-9(6-19-20-7-18-13(16)25)11(24)21-8(5-10(22)23)3-2-4-17-12(14)15/h7-9,19h,2-6h2,1h3,(h,21,24)(h4,14,15,17)(h3,16,18,20,25)/t8-,9+/m0/s1key: pnffupqadhhlmn-dtwkunhwbi smiles o=c1n(c)(c(=o)n(c1)ccc/n=c(\n)n)cnn\c=n\c(=o)n properties chemical formula c13h25n9o3 molar mass 355.403 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references