The 4-(acetylamino)-3-hydroxy-5-nitrobenzoic acid molecule, C9H8N2O6,
a designed inhibitor for the influenza virus neuraminidase protein, cr
ystallizes as hydrogen-bonded dimers. The dihedral angles of the subst
ituent groups with respect to the planar phenyl moiety are 5.0(3)degre
es for the carboxyl group, 45.0(2)degrees for the nitro group and 37.3
(1)degrees for the acetylamino substituent. The crystal structure is s
tabilized by intermolecular hydrogen bonding.