COC(=O)c1c(N2C(=O)[C@@H]3[C@@H]4CCCN4[C@@]4(C(=O)Nc5c4ccc(C)c5C)[C@@H]3C2=O)sc(C)c1C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?