with a metal carbon bond belonging to a ring, e.g. ferocene

Full Title

Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions > having metal-to-carbon bonds > with a metal carbon bond belonging to a ring, e.g. ferocene