निम्नलिखित में से `1^(@),2^(@)` तथा `3^(@)` ऐमीन्स छाँटिए-
`CH_(3)-CH_(2)-CH_(2)-NH_(2),CH_(3)-CH_(2)-underset(CH_(3))underset(|)(N)-CH_(3),`
`CH_(3)-overset(NH_(2))overset(|)(CH)-CH_(3),CH_(3)-CH_(2)-overset(H)overset(|)N-CH_(2)CH_(3),`
`C_(2)H_(5)-CH_(2)-CH-CH_(2)-CH_(3),`
`C_(2)H_(5)NH_(2),C_(2)H_(5)NHCH_(3),C_(2)H_(5)N(CH_(3))_(2),(C_(2)H_(5))_(3)N`

Explanation

`1^(@)`ऐमीनस `:CH_(3)CH_(2)CH_(2)NH_(2),C_(2)H_(5)NH_(2),`
`CH_(3)-overset(NH_(2))overset(|)(CH)-CH_(3),C_(2)H_(5)-CH_(2)-overset(NH_(2))overset(|)(CH)-CH_(2)-CH_(3)`
`2^(@)` ऐमीनस `:CH_(3)-CH_(2)-overset(H)overset(|)N-CH_(2)CH_(3),C_(2)H_(5)NHCH_(3)`
`3^(@)` ऐमीनस `:CH_(3)-CH_(2)-overset(CH_(3))overset(|)N-CH_(3),C_(2)H_(5)N(CH_(3))_(2),(C_(2)H_(5))_(3)N`