CCCCCCCCCCCCCC(=O)OCC(CCS(=O)(=O)O[C@H]1CC[C@@]2(C)C(=CC[C@H]3C4CCC(=O)[C@@]4(C)CCC32)C1)OC(=O)CCCCCCCCCCCCC
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?