Additional file 1 of Honokiol attenuates diabetic nephropathy by targeting SIRT3 to suppress mitochondrial ROS-induced pyroptosis

Supplementary Material 1:Structural characterization of honokiol by ¹H NMR spectroscopy and UPLC‒MS analyses. A: ¹H NMR spectrum in CDCl₃ showing diagnostic proton signals. B: UPLC chromatogram obtained with a C18 column using acetonitrile/water gradient elution. C: ESI mass spectrum confirming the molecular weight