COC1=C2CC(C)CC(OC)C(O)C(C)/C=C(\C)C(OC(N)=O)C(OC)/C=C\C=C(/C)C(=O)NC(=C(/C=N/C(C)(C)C)C1=O)C2=O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?