Oc1ccc(Cl)cc1C1=NC(NCN2CCN(CNC3=NC(c4ccccc4)CC(c4cc(Cl)ccc4O)=N3)CC2)=NC(c2ccccc2)C1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?