<unk> , also known as 19-nor-δ9,11-testosterone or as estra-4,9,11-trien-17β-ol-3-one, is a synthetic estrane steroid and a derivative of nandrolone (19-nortestosterone). It is specifically nandrolone with two additional double bonds in the steroid nucleus.<unk>  esters, which have an ester at the C17β position, include<unk>  acetate,<unk>  enanthate,<unk>  hexahydrobenzylcarbonate, and<unk>  undecanoate. +Basic information about different types steroids included base<unk>  inside structure. Name:<unk> <unk>  acetate<unk>  enanthate<unk>  hexahydrobenzylcarbonate (cyclohexylmethylcarbonate) Structural frameless frameless frameless frameless Formula C18H22O2 C20H24O3 C25H34O3 C26H34O4 Crystal system monocrystalic monocrystalic monocrystalic Elimination half life 48–72 hours short 1–2 days; 3 days long 11 days 8 days
Trenbolone
Oxendolone
Oxymetholone
Metenolone
Ganaxolone
Stenbolone
Methylstenbolone
Trestolone