At the same time, some other oxycompound groups, such as carbonyl group, aldehyde group and ketone group, appear or increase with temperature rising.

与此同时，醛、酮、酯类羰、芳香酮、醛类羰等类含或者从无有，或者官量不断增加。

The syntheses of two new derivatives of 4 - pyrone, by the reaction of adipyl choloride with enamines deriving from chain ketones and aldehydes, are described.

本文由链状醛酮的烯胺与己二酰氯反应合成两个新的4-吡喃酮衍生物。