Formebolone is an orally active anabolic-androgenic steroid that is included in the list of prohibited substances by the World Anti-Doping Agency. Formebolone was used in Italy and Spain for infants with malnutrition.

Formebolone:
https://drugs.ncats.io/drug/Z2MMV08KUQ

Esiclene is a steroid that is somewhat different from the others. The substance formebolone is available in various forms of administration. For athletes only the injectable version is of interest. Because of its anabolic effect, Esiclene is not well suited as a steroid for athletes. In bodybuilding, however, it is a highly valued and commonly used compound since it has the unusual characteristic of allowing any muscle to increase in diameter and size within the shortest period. How is this possible? Esiclene stimulates the muscle tissue located at the point of injection. The tissue defends itself or shall we say, reacts with a local inflammation. Over a period of 1-2 weeks a temporary growth gain of 1 - 1.5 inches on arms and calves can be obtained. At most, two or three different muscles are usually injected at the same time.

Excerpt from Anabolic Bible:
http://anabolic-bible.org/anabolic-steroid-info/steroid-profiles/esiclene-formebolone

Esiclene was originally used to treat children deficient in growth; this was due to its (mild) steroidal yet non-estrogenic properties which can cause growth in children. The injectable version is commonly used in bodybuilding circles to cause (temporary) localized growth, much like Synthol yet more "even" and much more temporary. Formebolone is available in various forms of administration and is actually a mild (non-anabolic, for all intents) form of methandrostenolone (Dianabol). There is very little, if any potential for growth with its use in any other form other than the injectable version.

In bodybuilding, the injectable form of Esiclene is commonly used due to an inflammatory response which causes a significant (though temporary) increase in muscle size and diameter at the site of injection. This local inflammation is due to an accumulation of lymph fluid within the injected muscle (the fluid is not under the skin, it is actually with in the muscle tissue). Esiclene is water soluble, therefore its effects begin to decrease after one day and most swelling subsides with in 4-5 days. Small muscle groups including triceps, biceps, calves and deltoids are most responsive to this compound's effects. Aside from significant pain due to the inflammation, the only other negative effect is the possibility for an odd shaped (awkward) muscle while it is inflamed.

I haven't actually used Esiclene (I'm not a bodybuilder of any sort) and don't know anyone who has used it. It was made popular in the 80's. For an athlete it has no merit at all.

Excerpt from thinksteroids.com:
https://thinksteroids.com/steroid-profiles/esiclene/

Formebolone is a synthetic anabolic steroid. As an AAS, it shows some anabolic activity, though it is inferior to testosterone in terms of potency, but is said to have virtually no androgenic activity.