3-hydroxy-2-(2-phenylpropan-2-yl)-7,8,9,10-tetrahydrobenzo[h]quinoline-4-carboxylic acid   、                                                                                         、                                                                                      
6,7-二甲基-1H-吲哚-2,3-二酮   、                                                                                      
1-hydroxy-4-methyl-3-phenylpentan-2-one                                                                                                                                                                                                                                                                                                          以to yield the desired product (12.5 mg, 6.0%) as a yellow solid的产率得到3-hydroxy-7,8-dimethyl-2-(2-methyl-1-phenylpropyl)quinoline-4-carboxylic acid