Nandrolone, whose formula is C18H26O2, was invented by scientists on the basis of a structural modification of 19-testosterone. It is obtained by alkyl action on the 19-testosterone molecule and is named 19-demethyltestosterone or Nandrolone. To know Nandrolone vs testosterone, we can know why people use NPP nandrolone phenylpropionate.  It is a modified form of testosterone and has a 19-1 modification. …