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a)CH3CH2CH(NH2)COOH
b)CH3CH2CH(NH2)CH2COOH = c)
d)CH3CH(NH2)CH2CH2COOH
e)CH3CH(NH2)CH2COOH = f)
g)CH2(NH2)CH2CH2COOH
h)CH3CH2CH2CH(NH2)COOH