CC(C)C[C@H]1CNC(=S)N1CC1CCCN1C[C@H](Cc1ccc(O)cc1)N1C[C@H](Cc2ccccc2)N(CC2CCCCC2)C1=S
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?