4 4 5 3 5 7 July 8, 2019 16 32 64 128 4 4 5 3 7 9 4 2 5 3 5 7 4 x 5 )- 3 x 7 )= 5 (- 4 4 5 diethyl 3 4 5 7 tetramethyl 6 propyldecan
