Synonyms : Amoxicillin EP Impurity G ; Amoxicillin USP Related Compound G ; (2S,5R,6R)-6-[[(2R)-2-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid ; D-(4-Hydroxyphenyl)glycylamoxicillin