The condensed structural formula of the compound is shown below :
https://c1.staticflickr.com/9/8561/28585072232_ac69421ee6_o.png
The principal function group -NH₂ at position 2 is named as a suffix -2-amine.
The benzene ring at position 4 is named as a prefix phenyl.
The IUPAC name of the compound is :
4-phenyl-hexan-2-amine (British)
OR 4-phenyl-2-hexanamine (US)
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Note :
-NH₂ can be used as a principal function group and named as a suffix - amine. For example, the IUPAC name of CH₃-CH₂-NH₂ is ethanamine (the name ethylamine is also accepted).
If there is a principal function group other than -NH₂, -NH₂ is named as a prefix amino-. For example, the IUPAC name of CH₃-CH(NH₂)-COOH is 2-aminopropanoic acid.