... of 1,3,5-tri-t-butyl- benzene, 1,3-dimethyl-5-t-butylbenzene, and 1,3-dimethyl-5- isopropylbenzene to Mr. D. .I. McCaulay of American Oil Co ... p-Cymene and cumeiie were Eastman organic chemicals. o-Diisopropylbenzene was received from The Dow Chemical Co., Midlalid, Mich ...