Cl.N=C(N)c1ccc(/N=N\c2c(O)ccc3cc4c(/N=N\c5ccc(C(=N)N)cc5)c(O)ccc4cc23)cc1
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?