CC(C)CCCC1(C)C=Cc2c(O)c3c(c(CCC(C)C)c2O1)OC12C(CC4CC1C(C)(C)OC2(CCC(C)C(=O)O)C4O)C3=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?