雌二醇   、                                                                                      
(2-Chloroethyl)(3-chloropropyl)carbamyl chloride                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide   、                                                                                                  
四丁基硫酸氢铵                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (2-Chloro-ethyl)-(3-chloro-propyl)-carbamic acid (8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl ester