4 5 8 9 tetramethyl 2 decyne July 8, 2019 16 32 64 128 2 4 7 9-tetramethyldec-5-yne-4 7-diol 2 4 7 9-tetramethyl-5-decyne-4 7-diol 2 4 7 9-tetramethyl-5-decyn-4 7-diol 2 4 7 9-tetramethyldec-5-in-4 7-diol 2 3 5 9-tetramethylbicyclo 4.4.0 decane