A revised 13C NMR spectral assignment of hellebrigenin

The previously accepted 13C spectral assignment of hellebrigenin was re‐examined and revised signal assignments are proposed for C‐1, C‐7 and C‐11. Results obtained in a (1H, 1H) COSY experiment and NOE experiments enabled us to assign the 1H NMR spectrum of hellebrigenin. The 13C NMR spectrum was subsequently assigned unambiguously by the correlations observed in a 2D (13C, 1H) chemical shift correlation experiment and a COLOC experiment.