La mid ah:

(E) -1,2-Diphenylethylene;(E)-Stilbene;1,1'-(1E) -1,2-Ethenediylbis[benzene];NSC 2069;trans-1,2-Diphenylethene;trans-1,2-Diphenylethylene;trans-Diphenylethene;trans-Stilbene

Dhoola-cadaynta Canonical:C1=CC=C(C=C1)C=CC2=CC=CC=C2