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. 2013 Mar 1;18(3):2803–2820. doi: 10.3390/molecules18032803

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Negative ion HPLC/ESI-IT-MS analysis of proanthocyanidins present in P. biglobosa. (a) total ion chromatogram of roots and (b) total ion chromatogram of barks.