Chloro[(S)-(-)-2,2'-bis(diphenylphosphino)-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl](p-cymene)ruthenium(II) chloride [RuCl(p-cymene) can catalyze the hydrogenation of unsaturated carboxylic acids to chiral compounds with higher optical rotation value than binaphthyl.
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