Picoline is the by-product in the preparation of diphenylamine with aniline.
吡啶是苯胺连续缩合合成二苯胺的副产物。
Picoline is the by-product in the preparation of diphenylamine with aniline.
吡啶是苯胺连续缩合合成二苯胺的副产物。
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