The U.S. Dairy Forage Research Center (USDFRC) Condensed Tannin NMR Database.

This Perspective describes a solution-state NMR database for flavan-3-ol monomers and condensed tannin dimers through tetramers obtained from the literature to 2015, containing data searchable by structure, molecular formula, degrees of polymerization, and 1H and 13C chemical shifts of the condensed tannins. Citations for all literature references are provided and should serve as valuable resource for scientists working in the field of condensed tannin research. The database will be periodically updated as additional information becomes available, typically on a yearly basis and is available for use, free of charge, from the U.S. Dairy Forage Research Center (USDFRC) Website.