The artificial sweetener aspartame $(A)$,$H_3N^{+}-CH(CH_2COO^{-})-CONH-CH(CH_2Ph)-COOCH_3$,is converted to . . . . . . on storage for extended periods of time in aqueous solution:
- A$H_3N^{+}-CH(CH_2COO^{-})-CONH-CH(CH_2Ph)-COOCH_3$
- B$H_2N-CH(CH_2COOH)-COOH + H_2N-CH(CH_2Ph)-COOH + CH_3OH$
- C$A$ cyclic diketopiperazine derivative + $CH_3OH$
- Dno change,remains as $(A)$
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