O=C(/C=C1\C[C@H]2C=Nc3ccccc3C(=O)N2C1)NCCCCNC(=O)/C=C1\C[C@H]2C=Nc3ccccc3C(=O)N2C1
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?