2,2,11,11-tetramethyldodeca-3,5,7,9-tetrayne 3,5,7,9-dodecatetrayne, 2,2,11,11-tetramethyl- InChI=1/C16H18/c1-15(2,3)13-11-9-7-8-10-12-14-16(4,5)6/h1-6H