Va. Raldugin et al., TRITERPENOIDS FROM ABIES SPECIES .18. NMR-SPECTRA OF ABIESLACTONE ANDITS DEHYDRO DERIVATIVE, Russian chemical bulletin, 45(11), 1996, pp. 2649-2650
The contradictions in the interpretations of the C-13 NMR spectrum of
a natural lanostanoid, abieslactone, and of the H-1 NMR spectrum of it
s 9,11-dehydro derivative reported in the literature were resolved by
two-dimensional H-1-H-1 and C-13-H-1 (COSY) NMR spectroscopy.