p. 669 - 672
(1983)2-amino-6-(methoxycarbonylamino)-4-(1,2,3,4-tetrahydro-1-pyridyl)pyrimidine 1-oxide
methyl 5-<3,6-dihydro-1(2H)-pyridyl>-2-oxo-2H-<1,2,4>-oxadiazolo<2,3-a>pyrimidine-7-carbamate
imidazole-1-carboxylic acid butyl ester
5-amino-7-<3,6-dihydro-1(2H)-pyridyl>-2H-<1,2,4>-oxadiazolo<2,3-c>pyrimidin-2-one