COc1ccc(C(=O)/C=C/c2ccc(OCCCCCCCCCCOc3ccc(/C=C/C(=O)c4ccc(OC)cc4)cc3)cc2)cc1
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?