3,5-dimethylhept-3-en-1-yne 3-hepten-1-yne, 3,5-dimethyl-, (5S)- InChI=1/C9H14/c1-5-8(3)7-9(4)6-2/h1,7,9H,6H2,2-4H3/b8-7+/t9-/m0/s