| http://www.w3.org/ns/prov#value | - anched chain alkyl group having 5 to 12 carbon atoms, provided that in the formula (5) R2 is straight or branched chain alkyl group having 9 to 12 carbon atoms, R3 is an alkyl group having 1 to 3 carbon atoms, and n is an integer of 0 to 5, said oil having a viscosity at 40??? C. of 2 to 70 cSt and a viscosity at 100??? C. of 1 to 90 cSt. 21.
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