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L-5-Hydroxytryptophan

DL-α-aminoadipic acid

DL-Glutamic Acid

Canavanine sulfate

DL-3-Cyanophenylalanine

DL-α-aminopimelic acid

1-Methyl-2,5-dihydro-1H-pyrrole

2,6,8-Trimethylimidazo[1,2-b]pyridazine

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