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Van Spronsen, J. (author), Witkamp, G.J. (author), Hollman, F. (author), Choi, Y.H. (author), Verpoorte, R. (author)The invention is directed to a process for extracting materials from biological material, which process is characterized in that the naturally occurring biological material is treated with an extractant consisting of a deep eutectic solvent of natural origin or a an ionic liquid of natural origin to produce a biological extract of natural origin...patent 2011