Pe catena de 5:
CH2(NH2)-CH2-CH2-CH2-CH3
CH3-C*H(NH2)-CH2-CH2-CH3 (2)
CH3-CH2-CH(NH2)-CH2-CH3
Pe catena de 4:
CH2(NH2)-C*H(CH3)-CH2-CH3 (2)
CH3-CH(CH3)-C*H(NH2)-CH3 (2)
CH3-CH(CH3)-CH2-CH2(NH2)
CH3-C(NH2,CH3)-CH2-CH3
Pe catena de 3:
CH2(NH2)-C(CH3)3
Sper ca sunt toate: 11