O=C1N[C@H](Cc2ccccc2)C(=O)N[C@H]1Cc1cn(S(=O)(=O)c2ccccc2)c2ccccc12
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?