2',3'-Dideoxycytidinene 2',3'-Dideoxydidehydrocytidine 4-Amino-1-(5-hydroxymethyl-2,5-dihydro-furan-2-yl)-1H-pyrimidin-2-one 7481-88-1 AIDS-000007 AIDS000007 Cytidine, 2',3'-didehydro-2',3'-dideoxy- DHC d4C ddeCyd