Determinations of the Configuration of C-20 in Derivatives of Adynerin Using DFT/HF Methods

The configurations of C-20 in derivatives of novel 5α-adynerin type, co-existing glycoside in pair, were identified with the calculated chemical shifts of carbon at the B3LYP/6-311 + G(2d,p) level. These glycosides are unusual cardic aglycones without the common olefin bond in ring E.