Nandrolone phenylpropionate and nandrolone decanoate
The first is short-acting while the second is a long-acting version of the same compound. Check out the profiles for a detailed description of each.
Deca was my very first cycle @ 450mg/wk/10wks. Although I gained nicely, I wouldn't recommend it as a first cycle, nor would I recommened a deca cycle w/o test. Recovery was a bit of a challenge.