CC(C)C[C@H]1CNC(=S)N1C[C@H]1CCCN1C[C@H](Cc1ccccc1)N1C[C@H](Cc2ccc(O)cc2)N(CC2CCCCCC2)C1=S
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?