(4aR,7aS)-4a-Hydroxy-5,6,7a-trimethyl-3,4,4a,7a-tetrahydro-2H-cyclopenta[b]pyran-7-one                                                                                                                                                              在
                                                                                                                                         palladium on activated charcoal                                                                                                                                                                                                                               
吡啶   、                                                                                                  sodium tetrahydroborate   、                                                                                                  
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 Toluene-4-sulfonic acid (4aR,5S,6S,7R,7aR)-4a-hydroxy-5,6,7a-trimethyl-octahydro-cyclopenta[b]pyran-7-yl ester