(2E)-2-(chloromethylene)-3,4-dihydronaphthalen-1(2H)-one 1(2H)-naphthalenone, 2-(chloromethylene)-3,4-dihydro-, (2E)- InChI=1/C11H9ClO/c12-7-9-6-5-8-3-1-2-4-10(8)11(9)13/h1-4,7H,5-6H2/b9-7