一般分子量在1000以下的，相对分子量较小的物质就叫低分子化合物。
生物胺是一类含氮的脂肪族或杂环类低分子化合物。
Biogenic amine is a kind of low molecular compounds belonging to nitric fatty group or heterocycle group.
煤中低分子化合物作为煤有机质的重要组成部分，日益受到人们的广泛关注。
As the important part of coal organic structures, low molecular weight compounds in coal and its effect on coal conversion features has been increasingly received interests recently.
煤中的低分子化合物一般是指分散于煤的高分子主体结构中的分子量小于500的有机化合物。
Low molecular weight compounds of coal is generally defined as those organic compounds with MW below 500 destributing in skeleton structure of coal macromolecular material.
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