are you sure you are not speaking of oral superdrol,
which is an alkylated(C-17) form of the esterfied masteron?
The chemical structure of what I assume is oral masteron(for it to be effective) would be 2a,17a-di methyl, 5a androstane 17B-hydroxy, 3-one.
This is a recently banned prohormone going under the other name of methyl-masterdrol. Can you upload a pic of it?