COC(=O)Cc1c(-c2c(CC(=O)OC)c3ccccc3n2C2OC(COC3OC(COC(C)=O)C(OC(C)=O)C(OC(C)=O)C3OC(C)=O)C(O)C(O)C2O)[nH]c2ccccc12
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?