both unformulated ( bulk ) and formulated ( drugs ) organic nitrate esters ( isosorbide dinitrate , nitroglycerin , and pentaerythritol tetranitrate ) were studied in the presence and absence of hydrochloric acid to determine if they could be sources of nitrite ( and therefore lead to nitrosamine formation ) under acidic conditions similar to those found in the stomach .
C0028125
nitrate
C0022252
isosorbide dinitrate