COc1ccc2[nH]c3c(c2c1)CCN1C(=O)C(CC(=O)NCC24C[C@H]5C[C@@H](C2)C[C@@H](C4)C5)C[C@H](C(=O)N2CCCCC2)[C@@]31C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?