COC(=O)C1=C(c2ccc3c(c2)OCO3)O[C@H](c2cc(OC)c(OC)c(OC)c2)[C@H]1COC(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?