1 1 2 3 3-pentamethyl-2 5 6 7-tetrahydro inden-4-one July 8, 2019 16 32 64 128 1 1 4 4-tetramethyl-1 2 3 4-tetrahydronaphthalene 6 7-dihydro-1 1 2 3 3-pentamethyl-4(5h)-indanone 1 3 7-trimethyl-2 3 6 7-tetrahydro-1h-purine-2 6-dione 1 3-dimethyl-3 4 5 6-tetrahydro-2(1h)-pyrimidinone
