Although our 1H and 13C NMR spectra matched the reported
data,1 we discovered that some specific peak assignments disagreed
with our 2D-NMR data. After close examination of our
2D-NMR data (COSY, HSQC, and HMBC) in CD3OD, we suggest reassignment
of certain 1H and 13C NMR peaks in compounds 1 and 2