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MS2 spectrum of isomeric disaccharides II-A/III-A (m/z 458.1 as the precursor ion) from the digested sample of human serum from platelet poor human plasma. The product ion m/z 357.0 is mostly contributed by [0,2A2]− fragment of II-A and m/z 236.9 corresponds to [B1]− fragment of III-A.
