Ribeiro da Silva, Manuel A. V. published the artcileExperimental study on the thermochemistry of some amino derivatives of uracil, COA of Formula: C5H6N2O2, the publication is Journal of Chemical Thermodynamics (2011), 43(11), 1763-1767, database is CAplus.
Values of the standard (p = 0.1 MPa) molar enthalpy of combustion, ΔcHm , of four crystalline compounds: 5-aminouracil, 6-aminouracil, 6-amino-1-methyluracil, and 6-amino-1,3-dimethyluracil, were determined, at T = 298.15 K, using a static bomb combustion calorimeter. The values obtained of standard molar enthalpy of combustion were used to derive the standard molar enthalpy of formation of the compounds investigated in their condensed phase and together with literature values of the standard molar enthalpy of sublimation, yielded the standard molar enthalpies of formation in the gaseous phase. These are discussed in terms of the effects of the mol. structure on the relative enthalpic stability.
Journal of Chemical Thermodynamics published new progress about 608-34-4. 608-34-4 belongs to pyrimidines, auxiliary class Pyrimidine,Amide, name is 3-Methylpyrimidine-2,4(1H,3H)-dione, and the molecular formula is C5H6N2O2, COA of Formula: C5H6N2O2.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia