tetramethylene
四甲撐; 環丁烷
Tet·ra·meth·yl·ene n. Chem. (a) A hypothetical hydrocarbon, C4H8, analogous to trimethylene, and regarded as the base of well-known series or derivatives. (b) Sometimes, an isomeric radical used to designate certain compounds which are really related to butylene.
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