C=CCNC1=C2C[C@@H](C)C[C@@H](OC)C(OC(=O)CCCN(C)C)[C@H](C)/C=C(\C)[C@@H](OC(N)=O)[C@H](OC)/C=C\C=C(/C)C(=O)NC(=CC1=O)C2=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?