Nitrolysis of syn,syn-2,4,6-tris-(n-propyl)-hexahydro-1,3,5-tripropionyl-s-triazine (3) with 1,1,1-trifluoroacetyl nitrate (TFAN) generated in situ from 1,1,1-trifluoroacetic anhydride and nitric acid in nitromethane gave mononitramine, dinitramine and trinitramine products depending on reaction duration and concentration of TFAN. Each of the three new nitramine products was purified and characterized by multi-nuclear magnetic resonance spectroscopy. An X-ray structure for syn,syn-2,4,6-tris-(n-propyl)-hexahydro-1,3,5-trinitro-s-triazine (syn,syn–10) is reported. The isomer syn,anti–3 did not yield analogous nitramine products by these nitrolysis conditions.