1,2-Diphenylethane-1,2-dione 1,2-Diphenylethanedione 134-81-6 Benzil Bibenzoyl Dibenzoyl Diphenyl-.alpha.,.beta.-diketone Diphenylethanedione Diphenylglyoxal Ethanedione, diphenyl- Glyoxal, diphenyl- NSC220315 WLN: RVVR