3-Oxo-5α-cholest-1-en-19-saeuremethylester                                                                                                                                                              在
                                                                                                                                                                                 
ruthenium(IV) oxide   、                                                                                                  
sodium periodate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (3R,3aR,5aS,6R,7S,9aS,9bS)-7-Carboxymethyl-3-((R)-1,5-dimethyl-hexyl)-3a-methyl-dodecahydro-cyclopenta[a]naphthalene-6,6-dicarboxylic acid methyl ester