中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
诺龙 | 19-nortestosterone | 434-22-0 | C18H26O2 | 274.403 |
(8R,9S,13S,14S,17S)-17-羟基-13-甲基-2,4,6,7,8,9,11,12,14,15,16,17-十二氢-1H-环戊并[a]菲-3-酮 | 17β-hydroxy-estr-5(10)-en-3-one | 1089-78-7 | C18H26O2 | 274.403 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(3α,5β,17β)-雌甾烷-3,17-二醇 | 5β-estrane-3α,17β-diol | 10002-97-8 | C18H30O2 | 278.435 |
19-去甲还原胆烷醇酮 | 19-noretiocholanolone | 33036-33-8 | C18H28O2 | 276.419 |
(5R,8R,9R,10S,13S,14S)-13-甲基十四氢-3H-环戊二烯并[A]菲-3,17(2H)-二酮 | 5β-estrane-3,17-dione | 5696-51-5 | C18H26O2 | 274.403 |
A simple method to distinguish the 5α- from the 5β-isomers of 3-oxosteroids based on low-frequency 1H NMR spectra was proposed. Additional 1H and 13C NMR characteristics were derived from the comparison of completely assigned spectra of the 5α- and 5β-isomers. The effect of substitution at different positions of steroid skeleton was evaluated on a series of isomeric 3-oxosteroids, prepared for this purpose.