COC(/C(C)=C/C=C/C(C)=C/c1coc(C)n1)C(C)C1CC(O)C2(C)OC2C=CC(C)C2CC(CC(=O)O2)CC2OC2C(=O)O1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?