COC1CC(C)C(OC)C2=CC(=O)C=C(NC(=O)/C(C)=C/C=C\C(C)C(OC(N)=O)/C(C)=C\C(C)C1OC)C2=O
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?