According to IUPAC, the numbering of the carbon atom with asterisk mark in the following compound is _____.
\begin{matrix} CH _3 & – & CH & – & \stackrel{*}{ C }H & – & CH _3 \\ & & | & & | & & \\ & & CH_2 & & CH_2 & & \\ & & | & & | & & \\ & & CH_3 & & CH_3 & & \end{matrix}
Longest possible chain is to be chosen.