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.

youdao

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.

youdao