5-[(1Z,3E)-4-(5-formylfuran-2-yl)buta-1,3-dienyl]furan-2-carbaldehyde 、 Bromo-[[bromo(triphenyl)-lambda5-phosphanyl]methoxymethyl]-triphenyl-lambda5-phosphane 以8%的产率得到(2E,4Z,10Z,13Z)-12,18,19-Trioxa-tricyclo[13.2.1.1
6,9]nonadeca-1(17),2,4,6,8,10,13,15-octaene