COc1ccc(C2CC(=O)Oc3c(C(CCN4CCCC(C)C4)c4ccc(N(C)C)cc4)c(OC)cc(OC)c32)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?