ethyl N-[4-(1-hydroxy-1-phenylprop-2-ynyl)phenyl]carbamate   、                                                                                      
2,3-Dimethoxy-7,8-dihydrobenzo[c]phenanthren-6-ol                                                                                                                                                              在
                                                                                                                                         camphor-10-sulfonic acid                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                生成                                                 ethyl N-[4-(10,11-dimethoxy-4-phenyl-3-oxapentacyclo[12.8.0.02,7.08,13.015,20]docosa-1(14),2(7),5,8,10,12,15,17,19-nonaen-4-yl)phenyl]carbamate