Copper bis 2 2 6 6 tetramethyl 3 5 heptanedionate July 8, 2019 16 32 64 128 2 2 3 6-tetramethylheptane 2 3 4 5-tetramethyl-2-cyclopentenone 2 3 6 7-tetramethylnaphthalene 2 2 6 6-tetramethyl-3 5-heptanedionate 2 2 6 6-tetramethyl-3 5-heptanedione