形容词
中文翻译：多环的
同义词：
['pentacyclophene', 'pentacycle']
例句：
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1. The pentacyclic compound is a key component in the synthesis of many drugs.
这种多环化合物是合成许多药物的关键成分。
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2. The pentacyclic compound has been shown to have anti-cancer properties.
这种多环化合物已被证明具有抗癌性质。
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3. The pentacyclic compound was found to be more effective than the previous treatment.
这种多环化合物被发现比之前的治疗更有效。