COC(=O)C/C=C\[C@@H](C)[C@@H](/C=N\O[C@@H](C)CN1CCCCc2nc(C)c(C)cc21)NS(=O)(=O)c1ccc(C)cc1
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?