CCCCCCCCCCCCCCCCNc1ccn(C2CC(O)C(COC(c3ccccc3)(c3ccccc3)c3ccc(OC)cc3)O2)c(=O)n1
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?