20-(phenylthioimino)pregn-5-en-3β-ol acetate

乙酰氯

3',4',6'-tri-O-acetyl-1',2',O-(pregnenolone-3-yloxyethylidene)-α-D-glucopyranose

2-oxo-5β,6β-epoxyprogestan-3β-ol 3β-acetate

5-Pregnen-3β-acetoxy-20-one-ethylenketal