I have a problem in naming this hydrocarbon. 
I don't know wheteher it should be 4-butyloct-2-yne or 5-(prop-1-yn-1-yl)nonane. Any help appreciated.
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2$\begingroup$ Related: How do you name an alkene using IUPAC rules if the longest carbon chain in this alkene does not include the double bond? $\endgroup$ – user7951 Mar 24 '20 at 8:28
