1(2H)-NAPHTHALENONE, 3,4-DIHYDRO-2-(3-PYRIDYLMETHYLENE)- 13640-51-2 2-(3-Pyridylmethylene)-3,4-dihydro-1(2H)-naphthalenone 5-21-09-00178 (Beilstein Handbook Reference) BRN 1461622 NSC 252129