描述:
(Z)-4-Ethyl-3-methyl-5-(3,4-dimethyl-5-formyl-2-pyrrolyl-methylen)-3-pyrrolin-2-on 、 3,3,3',4'-Tetramethyl-3,4-dihydro-5-methoxy-2,2'-pyrromethen-5'-carbonsaeure-tert-butylester 以32%的产率得到(4Z,10Z,15Z)-17-Ethyl-19-oxo-1-methoxy-3,3,7,8,12,13,18-heptamethyl-2,3,19,22,24-pentahydro-bilin