Mesoionic carbenes are similar to N-heterocyclic carbenes.

中离子碳烯类似于氮杂环碳烯。

Heterocyclic compounds with nitrogen heteroatom (s) only.

仅含有氮杂原子的杂环化合物。

N-oxides of heterocyclic esters, amides, thioesters, and ketones.

杂环酯，酰胺，硫代酸酯和酮的N-氧化物。

The heterocyclic compound can be applied in the field of pesticide.

这类化合物有可能应用于农药领域。

Vegetables do not form heterocyclic amines or any other carcinogens during cooking.

蔬菜在烹饪过程中不会形成杂环胺或者其它致癌物。