6-Methyluracil6-Methyl-1H-pyrimidine-2,4-dione2,4-Dihydroxy-6-methylpyrimidine6-Methyl-2,4(1H,3H)-pyrimidinedione2,4-二羟基-6-甲基嘧啶6-甲基尿嘧啶6-Methyluracil2,4-Dihydroxy-6-methylpyrimidine6-Methyl-2,4(1H,3H)-pyrimidinedioneNSC 9456Pseudothymine6-methyluracil