pterin

Etymology
From Greek: πτερόν (pteron) = wing (because it was first found in butterfly wings).

Noun

 * 1)  A ketonic amide derivative of pteridine responsible for some of the colouring in nature. It is also a component of folic acid.

Derived terms

 * pteridine

Translations

 * Chinese:
 * Cantonese: 蝶呤
 * Mandarin: 蝶呤
 * Japanese: プテリン
 * Korean: 프테린