CC(=O)Oc1c2c(c(CC=C(C)C)c3c1C(=O)C1=C[C@@H]4CC5C(C)(C)OC(C/C=C(/C)C(=O)O)(C4=O)[C@@]15O3)OC(C)(CCC=C(C)C)C=C2
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?