isosorbide-5-mononitrate [ 5-ISMN,5-ISMN Durules,Elantan,Imdur,Ismo,Monizid,Mono Mac 50D,Monoket,Mononit,Olicard 40,Olicard-retard,isosorbide mononitrate,isosorbide-5-nitrate,monocinque ] for prevention of angina pectoris; structure given in first source; a Russian drug