[p-[[4-[ethyl[2-hydroxy-3-(trimethylammonio)propyl]amino]-o-tolyl]azo]-beta-oxophenethyl]trimethylammonium bis[tetrafluoroborate(1-)];Benzeneethanaminium, 4-[[4-[ethyl[2-hydroxy-3- (trimethylammonio)propyl]amino]-2-methylphenyl]azo ]-N,N,N-trimethyl--oxo-, bis[tetrafluoroborate(1-)]
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