O=C(N[C@H]1C/C=C\C[C@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N[C@@H](c2ccccc2)COC1=O)OCC1c2ccccc2-c2ccccc21
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?