NC(=O)C1(NC(=O)[C@@H]2CC3(CC(c4cccc(NC(=O)[C@@H]5CCC(=O)N5)c4)=NO3)CN2C(=O)c2ccccc2)CC1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?