COC(=O)C/C=C\[C@@H](C)[C@@H](/C=N\OC[C@@H]1O[C@H](c2ccccc2)C=C[C@@H]1Oc1ccc(OC)cc1)OC
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?