Androxine is Alpha Pharma's trenbolone base in aqueous suspension - ten ampoules at 50 mg/ml - and the missing ester is the entire point of it. Acetate, enanthate and hexahydrobenzylcarbonate versions all release trenbolone gradually; this one has nothing to release, because the compound is already free.
Trenbolone is a 19-nor androgen, structurally a nandrolone derivative, and it does not aromatise to estrogen. Being water-based, the suspension must be shaken to re-disperse before drawing, and it shares the very short activity window common to every unesterified injectable.