CCC1=C2CC[C@H]3C(=O)N(c4ccccc4)C(=O)[C@H]3[C@H]2[C@@]2(C)/C(=N/CC3CC3)OC(=O)N2C1=O
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?