Noun:

1. any of several bases that are derivatives of purine

2. a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances

Puysn.皮伊(在法国；东经 1º08' 北纬 49º57')PUabbr.钚(=plutonium)abbr.推进装置(=propulsion unit)purified antimony sulfide[医] 纯硫化锑Puhnonary thromboembolism肺血栓栓塞puerperal blackish tongue产后舌黑purchasing price for cash现钞买入价Puccinia caricis-lingiin.林氏苔草柄锈菌purgating excessive fluid攻逐水饮purified terephthalic acid精对苯二甲酸Puccinia polygoni-alpinin.高山蓼柄锈菌purpura hyperglobulinemica高球蛋白血性紫癜puerperal pericardiac pain产后心包络痛

1. Adenine has a purine ring structure.
   腺嘌呤具有嘌呤环的结构。
2. Purine rich foods are on the top of the table.
   嘌呤丰富的食物是表格上方的。