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CAS Number :
66-22-8
Synonym :
2,4-Dihydroxypyrimidine
Molecular Formula :
C₄H₄N₂O₂
Uracil is a common and naturally occurring pyrimidine nucleobase in which the pyrimidine ring is substituted with two oxo groups at positions 2 and 4. Found in RNA, it base pairs with adenine and replaces thymine during DNA transcription.