the carbon skeleton being saturated and containing rings

Full Title

Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups > containing thio groups and carboxyl groups bound to the same carbon skeleton > having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton > the carbon skeleton being saturated and containing rings