Diquat85-00-7100 % similar Diquat2764-72-985 % similar Phenacylpyridinium bromide16883-69-534 % similar 1-Propylpyridinium bromide873-71-233 % similar 1,1'-Difluoro-2,2'-bipyridinium Bis(tetrafluoroborate)178439-26-431 % similar 1-Butylpyridinium bromide874-80-631 % similar Ethane-1,2-diylbis(triphenylphosphonium) bromide1519-45-531 % similar Ethylpyridinium bromide1906-79-231 % similar