Beyond Precipitation: UPLC–QTOF–MS/MS Reveals a Hidden Tannin Profile in Canavalia cathartica Seeds — Raw FTIR spectrum and UPLC-QTOF-MS/MS (Negative ESI) Spectral Data

The raw data provided here comprises the FTIR spectrum and UPLC-QTOF-MS/MS (negative electrospray ionization mode) data of Canavalia cathartica seed tannin extract (CC-STE). This dataset supports the identification of gallic acid and gallic acid 3-O-(6-galloylglucoside) as tannin-associated constituents in C. cathartica seeds, providing molecular-level evidence for the presence of tannins in this species. Data are provided in support of the manuscript "Beyond Precipitation: UPLC–QTOF–MS/MS Reveals a Hidden Tannin Profile in Canavalia cathartica Seeds."