Derive the structure of the compound having IUPAC name 3-amino-4-methylpentan -1-oic acid.

Explanation

(i) The word root pent indicates a chain of five carbon atoms.
`overset(5)C - overset(4)C- overset(3)C - overset(2)C-overset(1)C`
(ii) The secondary suffix -oic acid and number 1 indicate the presence of a -COOH group at position 1. Therefore, the carbon atom number 1 should be written as COOH.
` overset(5)C- overset(4)C - overset(3) C - overset(2) C - overset(O ) overset(|| 1)C-OH`
(iii) Attaching the substituent `-NH_2` (amino) group at position 3 and `-CH_3` (methyl) group at position 4, we have
`overset(5)C - overset(CH_3) overset(4| )C-overset(NH_2)overset(3| )C - overset(2)C - overset(O ) overset(||1) C-OH `
(iv) Satisfying the remaining valencies of all the carbon atoms, we get
` H -underset(H) underset(|) overset(| ) overset(H) overset(|5)C- underset(H) underset(|) overset(CH_3)overset(|3)C- underset(H) underset(|) overset(H ) overset(|2) C-overset(O ) overset(||1)C-OH `
Therefore, the structure of the given compound is
` CH_3 - overset(CH_3) overset(|)(CH ) - overset(|)(CH ) - CH_2 -COOH`