CO[C@@H]1[C@@H](OC2OC(C)C(OC3CC(C)(O)C(OC(=O)CC(C)C)C(C)O3)C(N(C)C)C2O)[C@@H](CC=O)C[C@@H](C)C(=O)/C=C/C2O[C@H]2C[C@@H](C)OC(=O)C[C@H]1OC(C)=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?