{HEAD ~ Preferred compounds} include Bi oxide, Co oxide, Cu oxide, Fe oxide, Mn oxide, and {TAIL ~ Pr oxide}, and optionally Ag oxide 
{ HEAD ~ Preferred compounds } include Bi oxide , Co oxide , Cu oxide , Fe oxide , Mn oxide , and { TAIL ~ Pr oxide } , and optionally Ag oxide
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH