(Z)-4-Ethyl-3-methyl-5-(3,4-dimethyl-5-formyl-2-pyrrolyl-methylen)-3-pyrrolin-2-on   、                                                                                      
1H-Pyrrole-2-carboxylic acid,3,4-dimethyl-5-[(1,3,3-trimethyl-5-oxo-2-pyrrolidinylidene)methyl]-,1,1-dimethylethyl ester, (Z)-                                                                                                                                                                                                                                                                                                          生成                                                 (4Z,9Z,15Z)-17-Ethyl-1,19-dioxo-3,3,7,8,12,13,18,21-oktamethyl-1,2,3,19,22,24-hexahydro-21H-bilin   、                                                                                             (4E,10Z,15Z)-17-Ethyl-1,19-dioxo-3,3,7,8,12,13,18,21-oktamethyl-1,2,3,19,22,24-hexahydro-21H-bilin