3-吡啶氧基乙酸, 3-Pyridyloxyacetic acid

5-(4-吡啶基)-1H-四唑, 5-(4-Pyridyl)-1H-tetrazole

嘧啶-5-羧酸, Pyrimidine-5-carboxylic Acid

均苯四甲酸, Pyromellitic Acid

1-吡咯烷羰基二硫酸铵盐, 1-Pyrrolidinecarbodithioic Acid Ammonium Salt

2-(1-吡咯烷基)苯酚, 2-(1-Pyrrolidinyl)phenol

丙酮酸, Pyruvic Acid

喹啉-3-硼酸, Quinoline-3-boronic acid

喹啉-4-甲酸, Quinoline-4-carboxylic acid

盐酸雷尼替丁, Ranitidine Hydrochloride

氧化铼(VII), Rhenium(VII) oxide

Rhodium,5% on alumina powder

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

玫瑰红酸二水合物, Rhodizonic acid dihydrate

碳酸铷, Rubidium carbonate