3-Methyl-2',3'-dideoxycytidine, dimethyl phosphate salt AIDS-157544 AIDS157544 Dimethyl hydrogen phosphate compound with 1-(5-(hydroxymethyl)tetrahydro-2-furanyl)-4-imino-3-methyl-3,4-dihydro-2(1H)-pyrimidinone (1:1) NSC644633