CCN(C(=O)COC(=O)CCS(=O)(=O)c1ccccc1)c1c(N)n(Cc2ccccc2)c(=O)[nH]c1=O
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?