CC(=O)OCC1OC(SC2=N/C(=C\c3ccc(Br)s3)C(=O)N2CN2CCOCC2)C(OC(C)=O)C(OC(C)=O)C1OC(C)=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?