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(a) Comparison of powder X-ray diffraction (PXRD) patterns, as well as (b) FTIR spectra for pentx, Hpca, and the (pentx)(Hpca) co-crystal (c) The asymmetric unit in (pentx)(Hpca), in which the (pentx)(Hpca) entities are held together through hydrogen bond depicted in dashed green line.
