Wörterbuch (en): Barberry extract / Berberine
de: 
Berberitzen-Extrakt (m) / Berberin (nt) 
fr: 
Extrait d'épine-vinette (m) 
it: 
Estratto di crespino (m) 
es: 
Extracto de berberis (m) 
Berberine has a yellow colour, which is why it is used for dyeing wool and leather. Under UV light Berberine fluoresces strongly yellow.