isosorbide dinitrate ( isdn ) and its degradation products isosorbide-5-mononitrate ( 5-ismn ) and isosorbide-2-mononitrate ( 2-ismn ) , in a spray formulation were separated and determined by step gradient rp-hplc within 8 minutes .
C0022252
isosorbide dinitrate
C0064079
5-ismn