| http://www.w3.org/ns/prov#value | - Generally, in this fraction having a boiling point of 140??? to 240??? C., there are contained aromatic olefins having 8 to 10 carbon atoms such as styrene, alkylstyrenes, indene, alkylindenes, coumarone, alkylcoumarones and the like in a proportion of 35 to 75% by weight.
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