definiens: means any and all of : ( A)(1 ) ( + ) -alpha - Methylbenzeneethanamine, also known as, ( II ) carbamazepine ( 5H - Dibenz{b, f}azepine- 5 - carboxyamide ), ( III ) guanfacine ( N-(Aminoiminomethy l)-2,6 - dichlorobenzeneacetamide ), ( IV ) lanthanum, a nd ( V ) mesalamine ( 5 - Amino-2 - hydroxybenzoic acid ), ( B ) any isomers, salts, solvates, hydrates, polymorphs, esters, prodrugs, or metabolites of clause ( A ), and ( C ) any compound involving forming or breaking a b ond or bonds with any of clause ( A ) or ( B ) where at least one prophylactic, therapeutic or diagnostic indicat ion of such compound and/or its metabolite is substantially the same as that of any of clause ( A ) or ( B ), but excl uding 10,11 - Dihydro-10 - oxo-5H - debenz[b, f]azepine-5 - carboxamide, also known as