alpha-Hydroxybetaxolol

Formula : C18-H29-N-O4
CAS : 87549-35-7 

Metabolite of betaxolol.

alpha-Hydroxymetoprolol

Formula : C15-H25-N-O4
CAS : 56392-16-6 

Pharmacologically active urinary metoprolol metabolite 5 to 10X less potent than metoprolol; cpd is alpha-hydroxymetoprolol.