p. 5331 - 5334
(1987)p. 2071 - 2077
(2007/10/02)2-amino-6-(4,4-diethoxy-3-oxopentylamino)-5-nitropyrimidin-4(3H)-one
2-Amino-6-(1,1-diethoxy-ethyl)-3,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-4-one
2,2a-dihydroxy-2-methyl-6-nitro-1,2,2a,3,4,5-hexahydro-1,5,8,8b-tetra-aza-acenaphthylen-7-one
2-acetamido-6-(4,4-diethoxy-3-oxopentylamino)-5-nitropyrimidin-4(3H)-one
2-amino-6-(4,4-diethoxy-3-hydroxypentylamino)-5-nitropyrimidin-4(3H)-one