rboxylic acid or salt thereof 575 Hydroxamic acid or salt thereof 576 Benzene ring containing 577 Polycyclo ring system 578 Acyclic acid or salt thereof 579 Nitrogen containing other than solely as a nitrogen in an inorganic ion of an addition salt, a nitro or a nitroso DOAI 580 Thioureas (i.e., N-C(=S)-N 581 Thiocarbazides or thiosemicarbazides (i.e., N-N-C(=S)-N containing) 582 Thiocarbazones or