Cc1cccc(NC(=O)Cn2c(=O)n(CCCCCC(=O)NCc3ccc4c(c3)OCO4)c(=O)c3sccc32)c1
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?