嘧啶-2-硫代甲酰胺, Pyrimidine-2-thiocarboxamide

吡咯-2-甲醛, Pyrrole-2-carboxaldehyde

4-吡咯烷丁胺, 4-(1-Pyrrolidinyl)-1-butylamine

3-(1-吡咯基)安息香酸, 3-(1-Pyrrolyl)benzoic acid

喹啉-8-硼酸, Quinoline-8-boronic acid

喹喔啉, Quinoxaline

氯化铼(III), Rhenium(III) chloride

罗丹宁-3-乙酸, Rhodanine-3-acetic Acid

氯化铑(III)水合物, Rhodium(III) chloride hydrate

核黄素, Riboflavin