Give the IUPAC names of the following compounds:
(i) `CH_(3)COCH_(2)COOC_(2)H_(5)`
(ii) `H_(2)NCH-(2)CH_(2)CH_(2)COOH`
(iii) `CH_(3)CH(CN)CH-(2)COCH_(3)`

Explanation

(i) `overset(4)(C)Hoverset(3)(C)Ooverset(2)(C)H_(2)overset(1)(C)OOC_(2)H_(5)("Ethyl-3-oxobutanoate")`
(ii) `H_(2)N-overset(4)(C)H_(2)overset(3)(C)H_(2)overset(2)(C)H_(2)-overset(1)(C)OOH`
(iii) `overset(5)(C)H_(3)-overset(4)overset(|)underset(CN)underset(|)(C)-overset(3)underset("4-methyl-2-oxopentaneitrile")(CH_(2)-overset(2)(C)Ooverset(1)(C)H_(3)("4-cyanopentan-2-one")`