Gemcitabine base 95058-81-4 Gemcitabine Hydrochloride 122111-03-9 2-Deoxy-2,2-difluoro-D-ribofuranose-3,5-dibenzoates "143157-22-6 (alpha isomer) 143157-25-9 (beta isomer)" 2-Deoxy-2,2-difluoro-D-erythro-pentafuranous-1-ulose-3,5-dibenzoate 122111-01-7 2-Deoxy-2,2-difluoro-D-erythro-pentofuranose-3,5-dibenzoate-1-methanesulfonate "122111-11-9 (racemate) 134877-42-2 (alpha isomer)" 2',2'-Difluoro-3',5'-dibenzoyl-2'-deoxycytidine 134790-39-9 (beta isomer)