Cc1ccc2c(CC(=O)OCC(=O)N(CC(C)C)c3c(N)n(Cc4ccccc4)c(=O)[nH]c3=O)coc2c1
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?