(R)-3-((R)-3-Hydroxy-butyryloxy)-pentanoic acid (R)-2-carboxy-1-methyl-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
4-二甲氨基吡啶   、                                                                                                  
2,6-二氯苯甲酰氯                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (4R,8R,12R)-4-ethyl-8,12-dimethyl-1,5,9-trioxacyclododecane-2,6,10-trione   、                                                                                             (4R,8R,12R,16R,20R,24R)-4,16-Diethyl-8,12,20,24-tetramethyl-1,5,9,13,17,21-hexaoxa-cyclotetracosane-2,6,10,14,18,22-hexaone