添加剂4-苯基吡啶氮氧化物（PPNO）或三甲基氧化氨（MNO）对产物的对映选择性略有改善。
The addition of the donor ligand such as 4-phenylpyridine N-oxide (PPNO) or trimethylamine N-oxide (MNO) exhibits a minor positive effect on the enantioselectivity.
添加剂4-苯基吡啶氮氧化物（PPNO）或三甲基氧化氨（MNO）对产物的对映选择性略有改善。
The addition of the donor ligand such as 4-phenylpyridine N-oxide (PPNO) or trimethylamine N-oxide (MNO) exhibits a minor positive effect on the enantioselectivity.
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