This note reports on a search for an extended scalar sector of the standard model, where a new CP-even (odd) scalar decays to a Z boson and a lighter CP-odd (even) scalar, which further decays to $\mathrm{b}\overline{\mathrm{b}}$. The Z boson is reconstructed via its decays to leptons. The analysed data were recorded in proton-proton collisions at \sqrt{s} = 13~\mathrm{TeV}, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9~\mathrm{fb}^{-1}. Data and predictions from the standard model are in agreement within uncertainties. Upper limits at $95\%$ confidence level are set on the production cross section times branching ratio, with masses of the resonances ranging up to 1000~\mathrm{GeV}. The results are interpreted in the context of the Two-Higgs Doublet Model.

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