COc1ccc2c(c1)CCC(CN1CCN(CCOC(c3ccc(F)cc3)c3ccc(F)cc3)CC1)=C2.O=C(O)/C=C\C(=O)O
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?