1,4-Bis(5-ethylsulfonylbenzoxazole-2-yl)naphthalene 2,2'-(Naphthalene-1,4-diyl)bis(5-(ethylsulphonyl)benzoxazole) 43115-21-5 Benzoxazole, 2,2'-(1,4-naphthalenediyl)bis(5-(ethylsulfonyl)- EINECS 256-099-8