METHOD:To preprae crotonobetaine from DL carnitine by 3 dehydrated methods, then transform crotonobetaine to L carnitine by E.
方法：DL-肉碱脱水制得巴豆甜菜碱，经大肠杆菌转化形成L-肉碱。
METHOD:To preprae crotonobetaine from DL carnitine by 3 dehydrated methods, then transform crotonobetaine to L carnitine by E.
方法：DL-肉碱脱水制得巴豆甜菜碱，经大肠杆菌转化形成L-肉碱。
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