Novel acetylated α-cyclosophorotridecaose produced by Ralstonia solanacearum

α-Cyclosophorotridecaose (α-C13) produced by Ralstonia solanacearum is isolated by trichloroacetic acid treatment and subjected to various chromatographic techniques. Here, we report for the first time that R. solanacearum produces acetylated α-C13. Structural analyses of the acetylated α-C13 were performed with 1D or 2D NMR spectroscopy, MALDI-TOF MS and HPLC. The results show that the α-C13 is substituted by mainly one acetyl residue at the C-6 position of the glucose unit.