CC(C)C[C@@H](CN1CCC[C@@H]1CN1C(=S)NC[C@@H]1Cc1ccccc1)N1C[C@H](Cc2ccc(O)cc2)N(CCc2ccccc2)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?