Amoxicillin EP Impurity G Catalogue A536307 CAS 188112-75-6 M.W 514.55 M.F C24H26N4O7S Specifications FAQs (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]heptane2-carboxylic acid