The Diels–Alder adduct prepared from cyclopentadiene and methyl (E)-3-acetoxy-2-cyanoacrylate (a newly synthesized dienophile) can be converted stereospecifically into the title compound using a retrograde aldol reaction under reductive conditions as a key step.
                                    由
环戊二烯和(E)-3-乙酰氧基-
2-氰基丙烯酸甲酯(一种新合成的亲二烯体)制得的Diels-Alder加合物可以通过还原条件下的逆向羟醛反应作为关键步骤,立体定向转化为标题化合物。