Racemization is found with optically active substrates.

发现旋光基质有外消旋作用。

Racemization is found with optically active substrate substrates.

发现旋光基质有外消旋作用。

Alternatively, the compound of the invention may be prepared using optically active reactants.

另外，本发明的化合物可使用光学活性反应物来制备。

Recent progresses of the synthesis of optically active tert-leucine are reviewed in this paper.

本文综述了近年来光学活性的叔亮氨酸的合成研究及最新进展。

Chiral synthesis can be achieved by taking advantage of natural or synthetic optically active compounds.

在手性合成中利用了天然或合成的光学活性化合物。