3 4-dihydro- 4 4 6-trimethyl-2(1h)-pyrimidone July 8, 2019 16 32 64 128 3 4-dihydropyrimidin-2(1h)-ones 1 3-dimethyl-3 4 5 6-tetrahydro-2(1h)-pyrimidinone 2 3-dihydro-3 5-dihydroxy-6-methyl-4h-pyran-4-one
