N-(2-Cyano-4,5-dimethoxy-phenyl)-4-(2-methyl-piperidine-1-carbonyl)-piperidine-1-carboximidothioic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 ammonium chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         formamide                                                                                  为溶剂,
                                                                                                                                                                                        以73%的产率得到[1-(4-Amino-6,7-dimethoxy-quinazolin-2-yl)-piperidin-4-yl]-(2-methyl-piperidin-1-yl)-methanone; hydrochloride