CC(NC(=O)c1ccc(OP(=O)(OCC2=CC(=O)c3ccccc3C2=O)N(C)CCCCCl)cc1)c1ccc(OCC2CCCCC2)c(C(N)=O)c1
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?