Substituent increments for the 1H-NMR. Chemical shifts of the 18- and 19-methyl protons of steroids. Part I: 9beta, 10alpha(retro)-steroids |
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| Authors: | G Englert W Arnold H Els A Fürst A Meier W Meister |
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| Abstract: | This paper reports 261 substituent increments for the 1H? NMR. chemical shifts (solvent: CDCl3) of the 18- and 19-methyl protons of 9β, 10α(retro)-steroids relative to 5β,9β,10α,-androstane. The increments were calculated by a least-squares procedure from 1334 spectra of 759 different steroids. |
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