CC1=C2c3ccccc3N(S(=O)(=O)c3ccccc3)[C@H]2[C@H](C(=O)N2C3C[C@H]4CC[C@@]3(CS2(=O)=O)C4(C)C)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?