1,2,3,4-Tetrahydro-1-oxo-5-hydroxynaphthalene; 5-Hydroxy-α-tetralone; 1,2,3,4-Tetrahydro-5-hydroxynaphthyl-1-one; 5-Hydroxy-3,4-dihydro-1(2H)-naphthalenone; 3,4-Dihydro-5-hydroxy-1(2H)-naphthalenone; 5-Hydroxy-1,2,3,4-tetrahydronaphthalen-1-one; 5-Hydroxy-3,4-dihydro-2H-naphthalen-1-one;

A metabolite of Levobunolol and d-Bunolol.