COCC12CCC(OC)C34C5CC6(O)C(OC)CC(OC(C)=O)(C5C6OC(=O)c5ccccc5)C(C(OC)C13)C4N(C)C2
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?