Glycolthymine

thymine glycol

5,6-Dihydro-5,6-dihydroxythymine

5,6-dihydroxy-5-methyl-1,3-diazinane-2,4-dione

5,6-Dihydro-5,6-dihydroxy-5-methylpyrimidine-2,4(1H,3H)-dione

5,6-Dihydro-5,6-dihydroxy-5-methyl-2,4(1H,3H)-pyrimidinedione