CCCCCCCNC(=O)C1(CC2CC(c3cccc(Br)c3)=NO2)CCN(C(=O)c2cc(OCC)c(OCC)c(OCC)c2)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?