稠环是芳香环的一种,两个环共用两个碳原子。
在地球上,烤糊的面包和汽车尾气里都含有稠环芳烃。
On Earth, polycyclic aromatic hydrocarbons are found on burnt toast and in automobile exhaust.
在稠环和桥环化合物中,两个碳原子是两个环公用的。
In fused-ring and bridged-ring compounds two carbons are common to the two rings.
含氮稠环衍生物,含该衍生物的药物组合物,和其作为药物的用途。
Nitrogenous fused-ring derivatives, medicinal compositions containing the derivatives, and use thereof as drugs.
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