C[C@H]1CN([C@H](C)CO)C(=O)c2cc(NC(=O)Cn3cnnn3)ccc2O[C@@H]1CN(C)S(=O)(=O)c1cn(C)cn1
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?