CCC1=C(OC(=O)N(CC)CC)N2C(=O)O/C(=N\CCc3c[nH]c4ccccc34)[C@]2(C)[C@H]2C1=CC[C@H]1C(=O)N(C)C(=O)[C@H]12
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?