(2E,4E)-(R)-4,6-Dimethyl-dodeca-2,4-dienoic acid ((3S,5R,9S,10R)-7,9-dichloro-10-hydroxy-2,8-dioxo-1-oxa-spiro[4.5]dec-6-en-3-yl)-amide                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
乙酸酐                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (2E,4E)-(R)-4,6-Dimethyl-dodeca-2,4-dienoic acid ((S)-7,9-dichloro-2,8-dioxo-1-oxa-spiro[4.5]deca-6,9-dien-3-yl)-amide