焦棓酸, Pyrogallol

吡咯-3-羧酸, Pyrrole-3-carboxylic Acid

4-(1-吡咯烷基羰基)苯硼酸, 4-(1-Pyrrolidinylcarbonyl)benzeneboronic acid

1-(2-羰基苯)吡咯, 2-(1-Pyrrolyl)benzoic acid

D-(-)-奎尼酸, D-(-)-Quinic Acid

喹啉-5-甲醛, Quinoline-5-carboxaldehyde

奎宁环, Quinuclidine

氧化铼(VI), Rhenium(VI) oxide

罗丹宁-3-乙酸, Rhodanine-3-acetic Acid

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

乙酰丙酮铑(III) Premion®, Rhodium(III) 2,4-pentanedionate

乙酸铷, Rubidium acetate

碘化铷, Rubidium iodide

Ruthenium

氯氧钌(III), Ruthenium(III) chloride oxide