2,3-Tetramethylen-isoniconitinsaeurehydrazid [German] 4-Quinolinecarboxylic acid, 5,6,7,8-tetrahydro-, hydrazide 5,6,7,8-Tetrahydrocinchoninic acid hydrazide Cinchoninic acid, 5,6,7,8-tetrahydro-, hydrazide GD4248000