Biotin

**Semantic type:** Organic Chemical|Vitamin

**Definition:** Hexahydro-2-oxo-1H-thieno(3,4-d)imidazole-4-pentanoic acid. Growth factor present in minute amounts in every living cell. It occurs mainly bound to proteins or polypeptides and is abundant in liver, kidney, pancreas, yeast, and milk. The biotin content of cancerous tissue is higher than that of normal tissue.

**Synonyms:** - (+)-Biotin - -(+)-Biotin - 5-(3-oxo-7-thia-2,4-diazabicyclo[3.3.0]oct-8-yl)pentanoic acid - BIOTIN - BIOTIN - Vitamin B-7 - Vitamin H - biotin - vitamin H