3b-hydroxy-1,4-androstadien-17-one undecanoate is a prohormone sold by Hi-Tech Pharmaceuticals under the name Equibolin. It can also be referred to as 1,4-Andro or 1,4-DHEA. This prohormone converts to boldione and boldiol, these two both convert directly to boldenone. Boldenone has a long history as a performance enhancing compound, it is also referred to as equipoise.
19-Norandrost-4-ene-3b-ol-17-one is a 19-Nor DHEA isomer. This compound is a prohormone which requires a two step conversion to the active metabolite nandrolone. Nandrolone is used for muscle building, performance, and aesthetic enhancement.
4-Andro is a non-methylated prohormone. It is a precursor to the male hormone testosterone, the king hormone and necessary compound for any cycle.