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Diisobutylaluminium hydride is a reducing agent with the formula (i-Bu2AlH)2, where i-Bu represents isobutyl (-CH2CH(CH3)2).
D 1895 (OTTO) Diisobutylaluminium hydride (1M soln. in Hexane) Cas 1191-15-7 - used in organic synthesis for a variety of reductions, including converting esters and nitriles to aldehydes.