N#Cc1ccc(C23CC4(C2)[C@@H](c2ccccc2)N(Cc2ccc(C(F)(F)F)cc2)C[C@@H]4C3c2ccc(C(F)(F)F)cc2)cc1
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?