(CH3)2·CH·CH2·CH2OH
Isoamyl alcohol

(b) Succinic Acid.

(1)

COOH·CH2·CH2·CH(NH2)·COOH
Glutamic acid

(2)

COOH·CH2·CH2·CO·COOH
α-Keto-glutaric acid

(3)

COOH·CH2CH2·CHO
Succinic semialdehyde

+ CO2

(4)