4 4 6 6 '- tetramethyl 2 2 '- bipyridine July 8, 2019 16 32 64 128 2 2 6 6-tetramethyl-4-piperidinone 2 2 6 6-tetramethyl-4-piperidone 2 4 6-trimethylpyridine 2 2 6 6-tetramethylpiperidine 4 4'-dimethyl-2 2'-bipyridine
