I found this on another board , hope it helps..
Think of methyltest, not methyl-1-test, just normal MT. Now, add the chlorine atom at hte C4. This chlorine stops the molecule from turning into an estrogen and a DHT derivative.
This chemical is also the 3-ol, making it a prohormone to chloromethyltest
The difference between this and Halodrol is that this chemical doesnt have the 1,2 double bond. The double bond (for boldenone atleast) half androgenic action so expect this to bring on more acne than Haldrol