various 3-hydroxy-2-phosphonylmethoxypropyl ( hpmp ) and 2-phosphonylmethoxyethyl ( pme ) derivatives of purine [ adenine ( a ) , guanine ( g ) , 2,6-diaminopurine ( dap ) , 2-monoaminopurine ( map ) , hypoxanthine ( hx ) ] and pyrimidine [ cytosine ( c ) , uracil ( u ) , thymine ( t ) ] have been evaluated for their antiviral properties .
C0041917
uracil
C0040087
thymine