对五联苯, p-Quinquephenyl

Rhein

硫化铼(IV), Rhenium(IV) sulfide

Rhodium,5% on alumina powder

溴化铑(III)水合物, Rhodium(III) bromide hydrate

氧化铑(III)五水合物, Rhodium(III) oxide pentahydrate

核黄素-5'-磷酸钠二水合物, Riboflavin-5'-phosphate sodium salt dihydrate

碳酸铷, Rubidium carbonate

硝酸铷, Rubidium nitrate

钌,0.5%负载于颗粒碳, Ruthenium,0.5% on granular carbon

氯化钌(III)水合物, Ruthenium(III) Chloride Hydrate

亚硝酰氯化钌(III), Ruthenium(III) nitrosylchloride

无水氧化钌(IV), Ruthenium(IV) oxide

水杨醛吖嗪, Salicylaldehyde Azine

亚水杨基苯胺, Salicylideneaniline