CC(C)C[C@@H](CN1CCCC1CN1C(=S)NC[C@@H]1Cc1ccc(O)cc1)N1C[C@H](Cc2ccc(O)cc2)N(CC2CCCCCC2)C1=S
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?