2-Ethyl-1,2-benzisoxazolium tetrafluoroborate4611-62-5100 % similar 2-Bromo-1-ethylpyridinium tetrafluoroborate878-23-940 % similar Benzyltriethylammonium tetrafluoroborate77794-93-533 % similar 2-Ethylbenzofuran3131-63-331 % similar 2-Chloro-3-ethylbenzoxazolium tetrafluoroborate63212-53-330 % similar