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.

该染料甲川链原子与氨基原子相连，而该原子又与染料甲川链形成烯。

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.

由链状醛酮烯与己二酰氯反应合成两个新4-吡喃酮衍生物。