The $IUPAC$ name of the compound $CHO-(CH_2)_4-COOH$ is:

What is the $IUPAC$ name for isophthalic acid?

What is the $IUPAC$ name of the following compound?

The $IUPAC$ name of $CH_3-CH(OH)-CH(OH)-CH(CH_3)-CHO$ is

Structures and $IUPAC$ names of some hydrocarbons are given below. Explain why the names given in the parentheses are incorrect.
$(a)$ $CH_3-CH(CH_3)-CH_2-CH_2-CH(CH_3)-CH(CH_3)-CH_2-CH_3$
Name: $2,5,6-$Trimethyloctane [and not $3,4,7-$Trimethyloctane]
$(b)$ $CH_3-CH_2-CH(CH_2CH_3)-CH_2-CH(CH_3)-CH_2-CH_3$
Name: $3-$Ethyl$-5-$methylheptane [and not $5-$Ethyl$-3-$methylheptane]

The $IUPAC$ name of the given structure is: