35285-70-2 4-22-00-00664 (Beilstein Handbook Reference) 4-Pyridinecarboxylic acid, 2-((p-tolyl)sulfonyl)hydrazide BRN 0277410 Isonicotinic acid, 2-((p-tolyl)sulfonyl)hydrazine N(sub 1)-Isonicotinoyl-N(sub 2)-p-tolyl-sulfonhydrazine [French]