5-Iodo-2',3'-dideoxyuridine105784-83-6100 % similar 2'-Fluorothymidine122799-38-639 % similar Dideoxycytidine7481-89-238 % similar Dideoxyguanosine85326-06-337 % similar Dideoxyadenosine4097-22-736 % similar Didanosine69655-05-636 % similar 5-Iodo-2′-deoxyuridine54-42-235 % similar Fialuridine69123-98-432 % similar cis-2,5-Bis(hydroxymethyl)tetrahydrofuran2144-40-332 % similar