gemcitabine [ 2',2'-DFDC,2',2'-difluoro-2'-deoxycytidine,2',2'-difluorodeoxycytidine,2'-deoxy-2',2''-difluorocytidine-5'-O-monophosphate,2'-deoxy-2'-difluorocytidine,Gemzar,LY 188011,LY-188011,dFdCyd,gemcitabine, (D-threo-pentafuranosyl)-isomer,gemcitabine, (alpha-D-threo-pentofuranosyl)-isomer,gemcitabine, (beta-D-threo-pentafuranosyl)-isomer ] structure given in first source; RN given refers to (D-erythro)-isomer