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Positive reflectron mode MALDI-TOF MS of SP4TM showing a PAC series from the trimer (m/z 997) to octamer (m/z 2437) in which the predominant mass at each degree of polymerization is representative of a PAC structure that contains one or more type-A interflavan bonds. Compounds are detected as Cs+ ion adducts [M+Cs]+.
