definiens: shall mean : ( a ) the 3 -(Hexadecyloxy)propyl hydrogen ( { [ ( 2S ) -1-(4 - amino -2 - oxo-1(2H ) -pyrimidinyl ) -3 - hydroxy -2 - propanyl]oxy}methyl)phosphonate ( alternatively named Phosphonic aci d, P-[[(S ) -2-(4 - amino -2 - oxo-1(2H ) -pyrimidinyl ) -1-(hydroxymethyl)ethoxy]methyl]mono[3 -(hexadecyloxy)propyl]ester ), known as ; ( b ) any Converting Compound that is Controlled by [COMPANY] as of the Effective Date ; ( c ) any Converting Compo und that is Controlled by [COMPANY] after the Effective Date and during the Term ; but excluding any Acquirer Compound ; ( d ) any metabolite of any of the compounds ( excluding Acquirer Compounds ) described in the preceding subparagraphs ( a)-(c ) ; ( e ) any prodrug, conjugate or complex of any of the compounds ( excluding Acquirer Compounds ) described in the preceding subparagraphs ( a)-(d ) ; or ( f ) any salt, free acid / base, solvate, enantiomer, isomer, hydrate, ester, racemate or polymorphic form of any of the compounds ( excluding Acquirer Compounds ) described in the preceding subparagraphs ( a)-(e )