(A) 2,4-dimethylpentan (B) 2,4-dimethylhexan
(C) 2,4,6-Trimethylheptan (D) 3-Ethyl-2-methylpentan
(E) 2,3-Dimethylpentan (F) 2,2-Dimethylhexan
(G) 2,5-Dimethylhexan (H) 4-Methylheptan
(I) 3-Ethyl-1,1,2,2-tetramethylcyclopentan (J) 1,1-Dimethylcyclohexan
(K) 2-Ethyl-1,1,3,3-tetramethylcyclopentan (L) 2,3-Dimethylbutan
