Amoxicillin USP impurity D;Ethyl Acetate Impurity 119;Amoxicillin Impurity D Sodium Salt (Mixture of Diastereomers);Amoxicillin Related Compound D ((4S)-2-{[(R)-2-amino-2-(4-hydroxyphenyl)acetamido](carboxy)methyl}- (1031547);(4S)-2-(((R)-2-Amino-2-(4-hydroxyphenyl)acetamido)(carboxy)methyl)-5,5-dimethylthiazolidine-4-carboxylic acid, Sodium Salt;Sodium (4S)-2-(((R)-2-amino-2-(4-hydroxyphenyl)acetamido)(carboxy)methyl)-5,5-dimethylthiazolidine-4-carboxylate (Amoxicillin Impurity)