Dioxins are a group of chemically-related compounds that are persistent environmental pollutants.

二恶英是一组对环境具有持久性污染力的化学物质。

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The agency said it had determined that levels of melamine or one of its related compounds, alone, below 1 part per million in infant formula were not a concern.

这个机构说，它已作出结论，婴儿配方食品中含有低于百万分之一的三聚氰胺或其中任何一种与其相关的化合物无需担心。

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Some 419 types of dioxin-related compounds have been identified but only about 30 of these are considered to have significant toxicity, with TCDD being the most toxic.

大约有419种类似二恶英的化合物被确定，但其中只有近30种被认为具有相当的毒性，以TCDD的毒性最大。

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It was then he had a flashback to work he'd done years earlier on morphine-related compounds.

FORBES: Tobacco-Free

Bristol-Myers' also holds rights to any Erbitux-related compounds, including an improved Erbitux that it is being developed.

FORBES: Magazine Article

Combinatorial chemistry elaborates lead drugs (such as the one that led to Lillys antimigraine drug) into entire families of related compounds.

FORBES: A hail of silver bullets