. "Diboron tetrahydroxide" . . . "Tetrahydroxydiboron" . "Sub-boric acid (Unterbors\u00E4ure in German)" . . "Tetrahydroxydiboron" . "Tetrahydroxydiborane(4)" . "Hypodiboric acid" . "Hypoboric acid" . "1,1,2,2-Tetrahydroxydiborane" . . "tetrahydroxydiboron" . . "(Dihydroxyboranyl)boronic acid" .