In an ongoing study of the products formed on pyrolysis of chitin (4) under a range of conditions, we now detail the isolation and characterisation of the crystalline and hitherto undetected pyridine N-oxide 18 and enamide 19. Pathways for the formation of these products have been proposed and subjected to both experimental and computational assessment.

中文翻译：

---

此外，几丁质衍生的小分子热解产物

在对甲壳质（4）在一系列条件下热解形成的产品的持续研究中，我们现在详细介绍了结晶和迄今未发现的吡啶N-氧化物18和酰胺19的分离和表征。已经提出了形成这些产物的途径，并对其进行了实验和计算评估。