(E)-1,4-Diphenyl-2-butene-1,4-dione 2-Butene-1,4-dione, 1,4-diphenyl-, (2E)- 2-Butene-1,4-dione, 1,4-diphenyl-, (E)- (8CI)(9CI) 959-28-4 EINECS 213-498-1 NSC 1983 trans-1,2-(Dibenzoyl)ethylene trans-1,4-Diphenyl-2-butene-1,4-dione