20,20-Ethylenedioxy-3α-hydroxy-21-methoxy-5α-pregnan-11-one                                                                                                                                                              在
                                                                                                                                                                                 sodium iodide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 72.0h,
                                                                                                                生成                                                 Diethylamino-acetic acid (3R,5S,8S,9S,10S,11S,13S,14S,17S)-3-hydroxy-17-(2-methoxy-acetyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-11-yl ester