5110-01-0 6-Methyl-2-(2-pyridyl)cinchoninic acid 6-Methyl-2-(2-pyridyl)cinchoninsaeure [German] CINCHONINIC ACID, 6-METHYL-2-(2-PYRIDYL)- Kyselin 6-metyl-2-(2-pyridyl)-cinchoninova [Czech]