$IUPAC$ name of is $\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,H\,\,\,\,\,\,{C_4}{H_9}} \\
{|\,\,\,\,\,\,\,\,\,\,|} \\
{C{H_3} - C - C - C{H_3}} \\
{|\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,{C_2}{H_5}\,\,C{H_3}}
\end{array}$
→$\begin{array}{*{20}{c}}
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C = C{H_2} + {{(C{H_3})}_2}CHC{H_3}\xrightarrow[{273\,K}]{{HF}}{C_8}{H_{18}}(A)}
\end{array}$ Unknown $(A)$ in the above reaction is
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