CH3-CH2-CH2-NH2CH3-CH(CH3)-NH2CH3-CH2-NH-CH3(CH3)3-N

Câu19:

CH

3

-CH

2

-CH

2

-NH

2

CH

3

-CH(CH

3

)-NH

2

CH

3

-CH

2

-NH-CH

3

(CH

3

)

3

-N