The present invention provides a compound of formula (I) in glycolate salt form a method for manufacturing the compound of the invention, and its therapeutic uses. The present invention further provides a combination of pharmacologically active agents and pharmaceutical compositions.FORMA CRISTALINA DE ACETATO DE (R)-7-(2-(1-(4-BUTOXI FENIL)-2-METIL PROPAN-2-IL AMINO)-1-HIDROXI ETIL)-5-HIDROXI BENZO [d] TIAZOL-2(3H)-ONA; COMPOSICIÓN Y COMBINACIÓN FARMACÉUTICAS; Y SU USO PARA TRATAR O PREVENIR DISTROFIA MUSCULAR, ATROFIA RELACIONADA CON DESUSO, CAQUEXIA O SARCOPENIA.