Steranes and terpanes exist in saturated hydrocarbon component of oil and source rock, and they are usually identified by gas chromatogram-mass spectrum.

甾萜类化合物存在于原油和生油岩的饱和烃组分中，通常用色谱-质谱法鉴定。

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The intelligence program infers molecular structure of hydrocarbon using spectrum-structure correlation rules inferred from about 2000 reference spectra of hydrocarbons.

智能解释程序，应用从大约2000个烃类化合物质谱提取的结构-谱图联系规律，解释质谱推导分子结构。

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