1H and13C spectra of biologically active compounds X. Two-dimensional HH COSY 45° and CH HET CORR spectra of the 18α- and 18β-isomers of glycyrrhetic acid 3-acetate

An assignment of¹H and¹³C NMR signals has been made by the methods of homonuclear two-dimensional spectroscopy, HH COSY (45°), and heteronuclear correlation spectroscopy, CH HET CORR. It has been shown that the range of diastereomeric effects in the¹³C NMR spectra substantially exceeds the effects due to solvents, in contrast to the proton spectra in which these ranges overlap.Institute of Chemistry, Bashkir Scientific Center, Urals Branch, Academy of Sciences of the USSR, Ufa. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 363–368, May–June, 1991.