14α,15α-epoxy-17α-hydroxy-4-estren-3-one   、                                                                                      
三氯乙酰异氰酸酯                                                                                                                                                                                              以
                                                                                         
氘代氯仿                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (2,2,2-Trichloro-acetyl)-carbamic acid (8R,9R,10R,13R,14R,15S,17R)-13-methyl-3-oxo-1,2,3,6,7,8,9,10,11,12,13,15,16,17-tetradecahydro-20-oxa-cyclopropa[14,15]cyclopenta[a]phenanthren-17-yl ester