(6-Amino-4-{2-[(Z)-hydroxyimino]-2-p-tolyl-ethylamino}-5-nitro-pyridin-2-yl)-carbamic acid ethyl ester
[6-Amino-5-nitro-4-(2-oxo-2-p-tolyl-ethylamino)-pyridin-2-yl]-carbamic acid ethyl ester
(5-Amino-3-p-tolyl-1,2-dihydro-pyrido[3,4-b]pyrazin-7-yl)-carbamic acid ethyl ester
(E)-α-Amino-p-methylacetophenon-oxim