L- tryptophan
 Molecular Formula:C11H12 N 2O2
Molecular Weight: 204.23
 CAS NO.: 73-22-3
 Content: 9%
 Character: White crystalline or crystalline powder, odorless, Slightly bitter taste
Performance: (1)Promotion of animal feeding, increase the lactation of dairy farming
          (2) Weaken the stress reaction, improve the animal sleep
            (3) Lower diet quality protein consumption, saving the cost of feed