| The Sigma Steroids Library
contains 3011 FT-IR spectra of a wide variety of natural and synthetic steroids. The
steroids and spectra were obtained and provided by Sigma Chemical Company. The spectra of
steroids not available from Sigma were obtained from samples provided to Sigma by the
United Kingdom Medical Research Council. The
spectra were measured from KBr pellets at 2 cm-1 digital resolution. The
spectra were mathematically deresolved when converted to Thermo Scientific's
Omnic® library format.
The following table gives the skeletal classifications
for the index number ranges.
| Index # range |
Skeletal Classification |
| 1-104 |
Estrane |
| 105-1074 |
Androstane |
| 1075-1182 |
Etianic acid |
| 1183-2099 |
Pregnane |
| 2100-2125 |
Cardane, Cardenolide |
| 2126-2321 |
Cholane, Cholanic acid |
| 2322-2682 |
Cholestane, Spirostane |
| 2683-2949 |
Ergostane, Lumistane,
Campestane |
| 2950-2976 |
Stigmastane, Poriferastane |
| 2977-3006 |
Lupane, Ursane, Oleane, etc. |
| 3007-3011 |
Steroid analogs |
|
