Optimized conditions for photosensitized preparation of green-yellow f
luorescent (lambda(Em)=530 nm) uranosylamino)pyrido[2,1-h]pteridin-11-
ium-5-olate (luminarosine) and its 2'-deoxy- and 2'-O-methyl-analogues
, the key compounds in our studies on the synthesis of fluorescence-la
beled oligonucleotides, have been developed.