CCC1=C(OC(=O)N(CC)CC)N2C(=O)O/C(=N\CC(=O)OC)[C@]2(Cc2ccccc2)[C@H]2C1=CC[C@H]1C(=O)NC(=O)[C@H]12
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?