Wikipedia:  

Uracil

Uracil; Hybar X; 2,4-Dioxopyrimidine; URACIL; Pirod; 2,4(1H,3H)-Pyrimidinedione; Uracil [USAN]; Ura; 2,4-Pyrimidinediol; Pyrod; 2,4-Pyrimidinedione
Molecular Formula
C4 H4 N2 O2
Natural Isotopic Abundance Mass
112.0867600000
Mono-Isotopic Molecular Masses
C12N14:   112.027277383
C13N14:   116.040696734
C12N15:   114.021347169
C13N15:   118.0347665206
Uracil image
Uracil
InCHi String:
InChI=1S/C4H4N2O2/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8)

isomeric and canonical SMILES:
C1=CNC(=O)NC1=O


IUPAC
1H-pyrimidine-2,4-dione

IUPAC traditional
1H-pyrimidine-2,4-quinone

IUPAC cas: IUPAC openeye: IUPAC systematic
pyrimidine-2,4-diol



PubChem Substance (SID):   85165007   149089   3406
PubChem Compound (CID):   1174
KEGG: Compound ID   C00106
CAS Registry IDs:   144104-68-7   42910-77-0   4433-21-0   4433-24-3   66-22-8   766-19-8
PDB Chemical Component   URA
Miscellaneous Databases and IDs:   CHEBI 17568   NSC 3970   EINECS 200-621-9   CCRIS 3077

Reference data were obtained primarily from the PubChem database.

Three dimensional molecular rendering uses Jmol.