CCOC(=O)CNC(=O)C(CSCC1C(=O)Nc2ccccc21)NC(=O)CCC(N)C(=O)OCC.O=S(=O)(O)O
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?