O=C(N/C(=C\c1ccc(/C=C(\NC(=O)c2ccccc2)c2nc3ccccc3s2)cc1)c1nc2ccccc2s1)c1ccccc1
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?