C=C(C)C(=O)O[C@H]1C/C(CO)=C/CCC(=C)C(OC(C)=O)[C@H]2OC(=O)C(=C)[C@H]12
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?