- - - -
Incidentally, are you sure it's a radical?
I don't mean 'radical' in the sense you understand. The term 'dichloroacetate' is an incomplete description of either a salt (eg. sodium dichloroacetate) or an ester (eg. isopropyl dichloroacetate). The DCA referred to in the article is I believe the sodium or potassium salt. As you correctly state, 'DCA' is actually the anion of dichloroacetic acid. However, when organic chemists discuss bits and pieces of molecules, rather than the entire molecules, they tend to call them 'radicals'.
Cheers, JaX