37697-53-3 AIDS-156120 AIDS156120 Formic acid compound with 7-fluoro-2-(hydroxymethyl)-6-imino-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5][1,3]oxazolo[3,2-a]pyrimidin-3-ol (1:1) NSC160436 O2,2'-Cyclocytidine, 5-fluoro-, monoformate (salt)