2 4 7 9-tetramethyldec-5-in-4 7-diol July 8, 2019 16 32 64 128 2 4 7 9-tetramethyl-5-in-4 7-diol 2 4 7 9-tetramethyl- 5-yne-4 7-diol 2 4 7 9 tetramethyldec 5 yn 4 7 diol