9-acetoxy-8-(7'-(9'-acetoxy-3',3'-dimethyl-7',10'-dioxo-7',10'-dihydro-3'H-naphtho[2,1-b]pyran-8'-yl)-5',8'-dioxo-5',8'-dihydroquinolin-6'-yl)-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione                                                                                                                                                              在
                                                                                                                                                                                 lithium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以67%的产率得到9-hydroxy-8-(7'-(9'-hydroxy-3',3'-dimethyl-7',10'-dioxo-7',10'-dihydro-3'H-naphtho[2,1-b]pyran-8'-yl)-5',8'-dioxo-5',8'-dihydroquinolin-6'-yl)-3,3-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione