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(2007/10/02)1-isobutyl-3-methyl-5-nitroso-6-amino uracil
3-Isobutyl-8-(3-methoxy-propyl)-1,7-dimethyl-3,7-dihydro-purine-2,6-dione
3-Isobutyl-8-(3-methoxy-propyl)-1-methyl-3,7-dihydro-purine-2,6-dione
N-(6-Amino-1-isobutyl-3-methyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl)-4-methoxy-butyramide
5,6-diamino-1-isobutyl-3-methyl-1H-pyrimidine-2,4-dione