COc1cc(/C=C2/C(=O)N(C(=O)OCC(C)C)C(Cc3cc(OC)c(OC)c(C)c3OC)C(=O)N2Cc2ccccc2)c(OC)c(C)c1OC
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?