Diethyl 2,2'-((((6-chloroquinoxaline-2,3-diyl)bis(oxy))bis(4,1-phenylene))bis(oxy))dipropanoate is an intermediate used in the preparation of ethyl 2-[4-(3-fluoro-2-quinoxalinyloxy)phenoxy]propanoate, a new fluoro analog of the herbicide quizalofopethyl.