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. 2014 Apr 8;9(4):e94302. doi: 10.1371/journal.pone.0094302

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© 2014 Zhang et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A. Preparative HPLC chromatogram of 80 fractions from the ethanol extract of Chinese wild grapevine. Compound absorbance (220 nm) was continuously recorded using a Photodiode Array (PDA) Detector. B. Analytical HPLC chromatogram of fraction 51 in positive cluster 1 (left) and fraction 55 in positive cluster 2 (right). C. Activity-directed fractionation scheme for the isolation of CFTR inhibitory single compounds from Chinese wild grapevine.