CC1=CC(=O)OC2CC3OC4C[C@@H](C)C5OC6CC7O[C@]8(C)C/C=C\C9OC%10CC%11OC(CC(C)CO)CC(O)[C@]%11(C)OC%10CC9OC8C[C@]7(C)O[C@]6(C)CCC5OC4C[C@]3(C)OC12
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?