IN view of the increasing importance of anhydro-N-carboxyamino-acids for the synthesis of polypeptides 1,2, it is pertinent to report the following simple preparation of compounds of this type.

Increasing gamma-aminobutyric acid (GABA) and balancing glutamate, brain chemicals called neurotransmitters, may help alleviate symptoms of fibromyalgia (FMS) and chronic fatigue syndrome (ME/CFS).

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