CCc1cc2c(nc1CC)CCN(CC/C(C)=N/OC[C@H]1O[C@H](c3ccccc3)C=C[C@@H]1Oc1ccc(OC)cc1)C2
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?