The racemization is particularly preferably carried out in organic solvents with or without {HEAD ~ the addition} of water at temperatures of between {TAIL ~ 150° C.} and 180° C. at a pressure of up to 10 bar for 20 to 26 hours 
The racemization is particularly preferably carried out in organic solvents with or without { HEAD ~ the addition } of water at temperatures of between { TAIL ~ 150 ° C. } and 180 ° C. at a pressure of up to 10 bar for 20 to 26 hours
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