COC(=O)[C@]12CC[C@H]3CN(C(=O)OCc4ccccc4)[C@H]([C@H]31)[C@H](c1ccco1)N2S(=O)(=O)c1ccc(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?