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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3el257

Select all correct statements about the compound shown.

AIt has a free amino group and a free carboxylic acid group
BIt contains a sulphonamide group
CIt contains an ester group
DIt has two stereocentres

Answer: A, C, D

The compound shown is aspartame (L-aspartyl-L-phenylalanine methyl ester). It has a methyl ester, a free NH2 and a free COOH from aspartic acid, and the two stereocentres are the alpha-carbons of the Asp and Phe residues (both S). There is no sulphur in it, hence no sulphonamide.

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