Ok I got this from the same forums here and it must be highly reguarded as its stickied here it is please feel free to discuss and vivisect this statement like everything else consensus of opinion along with anecdotal real world evidence means a lot.
Epistane/Havoc/Hemaguno
Innovators: IBE, RPN, Spectra Force
Nomenclature: 2a-3a-epithio-17a-methyl-5a-androstan-17b-ol
Pill Size: 10mg or 12.5mg depending on what brand you use
Dosages: 20-50mg
Side Effects: Milder on liver and lipid levels than other methyls. Known to cause lower back and calf pumps.
Reputation: There has had some spectroscopy and compound identification issues with these products, but from personal experience with it, is still a solid product. Many users have taken this compound as a solo run for gynecomastia reduction due to it's SERM-like and anti-aromatase properties. It is also a popular compound for use with the 'pulse method' of taking orals. Users can expect to see significant gains in both strength and mass.