核黄素, Riboflavin

氯化铷, Rubidium Chloride

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

碘化钌(III),无水, Ruthenium(III) iodide

氧化钌(IV), Ruthenium(IV) oxide

水杨酸, Salicylic Acid

氟化钐(III), Samarium(III) fluoride

皂草苷, Saponin

水合乙酸钪(III), Scandium(III) Acetate Hydrate

三氧化二钪, Scandium(III) oxide