CC(C)C[C@H]1CN([C@@H](CC(C)C)CN2CCC[C@@H]2CN2C(=S)NC[C@@H]2Cc2ccc(O)cc2)C(=S)N1CCc1ccccc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?