Azaerythromycin A 11,12-Hydrogen Borate Catalogue A535223 CAS 194809-66-0 M.W 760.77 M.F C37H69BN2O13
Azithromycin EP Impurity L (Azithromycin N-Oxide) Catalogue A5352112 CAS 90503-06-3 M.W 765.00 M.F C38H72N2O13