C=C(C)[C@@]1(O)O[C@H]2C[C@@]3(C)OC(=CC3=O)/C(C)=C\[C@@H]3OC(=O)[C@@]1(C)[C@H]32
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?