di-propionate ester ???

Di-propionate esters are two separated propionate esters attached to the parent steroid.

For example Mastabol (Masteron) from British Dragon is made with di-propionate ester.
 
Dipropionate means there are two propionate esters attached to the anabolic. It effectively has the same half-life as a normal propionate anabolic, except two esters need to be removed in order for it to be effective.
 
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