1-Bromo-2,2-diphenyl-1-(p-ethylphenyl)ethylene 21141-45-7 BRN 2282501 Bromo-1 (p-ethylphenyl)-1 diphenyl-2,2 ethylene [French] ETHYLENE, 1-BROMO-2,2-DIPHENYL-1-(p-ETHYLPHENYL)-