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The substituent induced shifts (SIS) of a hydroxyl group at position 5α over the 13 C chemical shifts on the A ring for some sapogenins have been calculated at B3LYP level of theory with the 6-31G** basis set within the DFT methodology with the GIAO approach.The calculated SIS at beta and gamma carbons fairly agrees with the experimental ones. The experimental anomalous deshielding SIS on...
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