2 3 4 5 tetramethyl 2 cyclopentenone July 8, 2019 16 32 64 128 2 2 4 4-tetramethylcyclobutane-1 3-dione 2 3 3 4 tetramethylpentan 2 2 4 4-tetramethyl-3-pentanol 2 2 3 4-tetrametilpentan
