The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of a group which forms an enamine with the methine linkage of the dye.

该染料甲川上的碳原基的原相连，而该原又染料的甲川烯胺。

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.

本文由状醛酮的烯胺己二酰氯反应合两个新的4-吡喃酮衍生物。