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Exclusive $B_c^\ast \rightarrow D_{s}~\nu \bar{\nu}$ decay is studied in theframework of the three--point QCD sum rules approach. The two gluon condensatecontributions to the correlation function are calculated and the form factorsof this transition are found. The decay width and total branching ratio forthis decay is also calculated.

Investigation of the rare exculsive $B_c^\ast \rightarrow D_{s}~\nu \bar{\nu}$ decays in the faramework of the QCD sum rules