| abstract |
A nucleoside, nucleotide, or derivative of either which has a nonnatural base. It is characterized by having as a base a 2-amino-6-(2-thiazolyl)purin-9-yl or 2-amino-6-(2-oxazolyl)purin-9-yl group (wherein the thiazolyl or oxazolyl group may have been substituted in the 4- and/or 5-position). |