Figure 2

Key 1H → 13C HMBC (arrow), 1H → 1H NOESY (double arrow) and 1H → 1H COSY (solid bond) correlations of compounds 5 and 11.

Key 1H → 13C HMBC (arrow), 1H → 1H NOESY (double arrow) and 1H → 1H COSY (solid bond) correlations of compounds 5 and 11.