1-propanone, 2-methyl-1-(2,3,5,6-tetramethylphenyl)- 2-methyl-1-(2,3,5,6-tetramethylphenyl)propan-1-one 778-40-5 InChI=1/C14H20O/c1-8(2)14(15)13-11(5)9(3)7-10(4)12(13)6/h7-8H,1-6H