in ortho-position to the carboxyl group, e.g. nitro-salicylic acids

Full Title

Compounds containing nitro groups bound to a carbon skeleton > the carbon skeleton being further substituted by carboxyl groups > having nitro groups and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton > the carbon skeleton being further substituted by singly-bound oxygen atoms > in ortho-position to the carboxyl group, e.g. nitro-salicylic acids