CCCCNC(=O)c1nc(C2CCN(S(=O)(=O)c3cccc(C(F)(F)F)c3)CC2)oc1-c1cccc(C(F)(F)F)c1
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?