(+/-)-2-[8-(2-chlorophenyl)-9-(2-hydroxyethyl)-2-methylpurin-6-yl]-1,3,4,7,8,8a-hexahydropyrrolo[1,2-a]pyrazin-6-one                                                                                                                                                              在
                                                                                                                                                                                 AD-H column                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 2-[8-(2-chlorophenyl)-9-(2-hydroxyethyl)-2-methylpurin-6-yl]-1,3,4,7,8,8a-hexahydropyaolo[1,2-a]pyrazin-6-one   、                                                                                             2-[8-(2-chlorophenyl)-9-(2-hydroxyethyl)-2-methylpurin-6-yl]-1,3,4,7,8,8a-hexahydropyaolo[1,2-a]pyrazin-6-one