2 4 6 8-tetramethyl-2 4 6 8-tetramethylcyclotetrasiloxane July 8, 2019 16 32 64 128 2 4 6 8-tetramethyl-2 4 6 8-tetravinylcyclotetrasiloxane 2 2 6 6-tetramethyloctane 2 2 6 6-tetramethylpiperide 2 4 4 6-tetrabromo-2 5-cyclohexadienone