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bufuralol

n. A potent beta-adrenoceptor antagonist with partial agonist activity.

Wikipedia
Bufuralol

Bufuralol is a potent beta-adrenoceptor antagonist with partial agonist activity. It is metabolized by CYP2D6.

Mostly all of the beta-blockers are aryloxypropanolamine based. In this rare exception, the benzofuran oxygen is part of a ring instead of derived from the epichlorohydrin precursor. iN this way , it could be considered a surrogate.