L-Histidin-benzylester,Bis-(toluol-4-sulfonat), (S)-Benzyl 2-amino-3-(1H-imidazol-4-yl)propanoate bis(4-methylbenzenesulfonate), L-histidine benzyl ester di-p-toluenesulphonate, histidine benzyl ester di-p-toluenesulfonate salt, histidine benzyl ester di-p-toluenesulfonic acid salt, O-benzyl-L-histidine bis(toluene-p-sulphonate), L-histidine benzyl ester di-para-toluene sulfonate, EINECS 246-334-2, L-histidine benzyl ester,bis-(toluene-4-sulfonate)