Turinabol (Chlorodehydromethyltestosterone, also known as ‘Tbol’ and Oral Turinabol) is actually a modified form of Dianabol (Methandrostenolone), whereby it is actually a combination of the chemical structures of Dianabol and Clostebol (4-chlorotestosterone). Hence this is why the actual chemical name is 4-chlorodehydromethyltestosterone. The modifications to its chemical structure allow it to be non-aromatizable and to also possess a very low androgenic rating, which is likely why Turinabol has been nicknamed as a ‘mild Dianabol’.