CCCCC/C=C\C/C=C\C=C\C=C\[C@@H](SCC(NC(C)=O)C(=O)O)[C@@H](O)CCCC(=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?