| http://www.w3.org/ns/prov#value | - Preferably, in the form of hydrochloride salt or racemic camphor sulfonic acid salt. [0043] Suitable metal catalysts include, but are not limited to, palladium in the form of palladium on carbon or palladium salts such as palladium hydroxide, palladium hydroxide on carbon, and the like, Raney nickel, platinum, iridium, ruthenium, and the like; preferably, a palladium catalyst, or Raney nickel and
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