N#CC12C(=O)N3C(=NC(c4ccccc4)NC3c3ccccc3)C1(C#N)C(c1ccccc1)NC1=C2CCC1
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?