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https://www.mediafire.com/file/4f8c4q6b467o1f5/Carbohydrate_Research_Volume_44_issue_2_1975_%5Bdoi_10.1016_s0008-6215%2800%2984168-3%5D_Anthony_N._de_Belder%3B_K.Ove_Wik_--_Preparation_and_properties_of_fluorescein-labelled_hyaluronate.pdf/file