CC1=C(C#N)C(=O)N(/N=C/c2ccc(Cl)cc2)C(=O)/C1=c1\o/c(=C2/C(=O)N(/N=C/c3ccc(Cl)cc3)C(=O)C(C#N)=C2C)c2nccnc12
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?