DL-α-生育酚                                                                                                                                                              在
                                                                                                                                                                                 
silver(l) oxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
正己烷                                                                                  为溶剂,
                                                                                                                                                                                        以34%的产率得到5,6,7',8,10',11',16',21',22'-Nonamethyl-7',8,16'-tris(4,8,12-trimethyltridecyl)spiro[1,2,9,10-tetrahydropyrano[3,2-f]chromene-3,19'-8,13,15-trioxapentacyclo[12.4.4.01,14.03,12.04,9]docosa-3(12),4(9),10,21-tetraene]-20'-one