Benzyl (S)-(-)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylate p-toluenesulfonic acid salt CAS No.: 24077497-97-3 Benzyl (S)-(-)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylate p-toluenesulfonic acid salt Notes: Quinapril Intermediate ¡¡