CCC[C@@H](CN1CCC[C@H]1CN1C(N)=NC[C@H]1CC(C)C)N1C[C@@H]([C@H](C)CC)N(CCCC2CCCC2)C1=N
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?