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5-Tert-butylpyrazin-2-amine

5-Isobutylpyrazin-2-amine

N-(2,5-dichloro-3-thienyl)acetamide

14-Hydroxyestrone

2-O-ethylthymidine

O(4)-ethylthymidine

.Beta.-d-ribofuranoside,4-nitrophenyl ,2,3,5-tribenzoate

.Beta.-d-ribofuranoside,4-nitrophenyl

4-[(Ethylamino)methyl ]-2-methyl-5-[(methylthio)methyl ]pyridin-3-ol dihydrochloride

5H-[1]benzopyrano[4,3-d]pyrimidin-5-one