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Fractionation and purification scheme (A) and chromatograms (B) of CBHI-A, CBHI-B, CBHI-C, and CBHI-D produced by Penicillium decumbens JU-A10. CBHI-A, CBHI-B, CBHI-C, and CBHI-D were purified according to peaks II, VI, VII, and VIII, respectively.