3,7-diethyl-4,6-dimethyl-nona-3,6-dien-5-one

(2S)-2-(2-oxopropanoylamino)propanoic acid

2,6-二甲基-2,6-辛二烯-1,8-二酸

diethyl 2-azidobutanedioate

2-azidopropionic acid