Cc1c(C(=O)N2CC3(CC(c4cccc(NC(=O)[C@H]5CCC(=O)N5)c4)=NO3)C[C@@H]2C(N)=O)cc([N+](=O)[O-])cc1[N+](=O)[O-]
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?