Amoxicillin Trihydrate EP Impurity L Catalogue A536312 CAS 1789703-32-7 M.W 563.66 M.F C24H29N5O7S2 Specifications FAQs (2S,5R,6R)-6-((2S,5R,6R)-6-((R)-2-amino-2-(4-hydroxyphenyl)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid