NOR 4

N-{(E)-4-Ethyl-3-[(Z)-hydroxyimino]-5-nitro-3-hexen-1-yl}-3-pyridine carbox

(±)-{(E)-4-Ethyl-2-[(Z)-Hydroxyimino]-5-nitro-3-hexene-1-yl}-pyridinecarboxamide

(+or-)-N-{(E)-4-Ethyl-2-[(Z)-hydroxyimino]-5-nitro-3-hexene-1-yl}-3-pyridinecarboxamide