名词中文翻译1
中文翻译：Unknown
同义词：
['tetracyclic', 'tetracyclic molecule', 'tetracycle']
例句：
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1. The structure of the compound is tetracyclic, which makes it difficult to synthesize.
这种化合物的结构是四元环，这使得它的合成变得困难。
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2. Tetracyclic compounds are often found in nature and have important biological functions.
四元环化合物通常存在于自然界中，并且具有重要的生物功能。
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3. The tetracyclic ring system is a common feature in many natural products, such as antibiotics and vitamins.
四元环系统是许多天然产物的常见特征，如抗生素和维生素。