(S)-1-(3-Hydroxy-2-phosphonomethoxypropyl)cytosine (S)-HPMPC 113852-37-2 120362-37-0 Cidofovir Cidofovir anhydrous GS 0504 HPMPC HPMPC [AmFAR Tx Dir 1993;6(4)] HSDB 7115 Phosphonic acid, ((2-(4-amino-2-oxo-1(2H)-pyrimidinyl)-1-(hydroxymethyl)ethoxy)methyl)-, (S)- Vistide