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Detection of xylose and rhamnose in the degradation products by negative-mode LC/ESI-Q-TOF-MS. Extracted ion chromatograms (EIC) for xylose [M−H]− 149.0455 and rhamnose [M−H]− 163.0612. (A) xylose standard, (B) degradation products of compound 1, (C) rhamnose standard, and (D) degradation products of compound 2.
