5-(4-methylphenylazo)-3-cyano-4-methyl-6-phenylpyridine-2-(1H)-thione   、                                                                                      
2,3,4,6-四乙酰氧基-alpha-D-吡喃糖溴化物                                                                                                                                                              在
                                                                                                                                                                                 
氢氧化钾                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                                                        以66%的产率得到[(2R,3S,4S,5R,6R)-3,4,5-triacetoxy-6-[5-cyano-4-methyl-2-phenyl-3-[(E)-p-tolylazo]-6-thioxo-1-pyridyl]tetrahydropyran-2-yl]methyl acetate