O=C(c1ccc2c(c1)N(Cc1ccccc1)C(=O)c1ccccc1S2(=O)=O)N1CCN(Cc2ccccc2)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?