The present invention relates to a novel and improved process for preparing (3S)-3-(4-chloro-3-{[(2S,3R)-2-(4-chlorophenyl)-4,4,4-trifluoro-3-methylbutanoyl]amino}phenyl)-3-cyclopropylpropanoic acid of the formula (I), to the compound of the formula (I) in crystalline form and to their use for the treatment and/or prevention of diseases, in particular for the treatment and/or prevention of cardiovascular, cardiopulmonary and cardiorenal disorders.本發明係關於一種新穎且改良方法,用於製備式(I)的(3S)-3-(4-氯-3-{[(2S,3R)-2-(4-氯苯基)-4,4,4-三氟-3-甲基丁醯基]胺基}苯基)-3-環丙基丙酸、在結晶型的式(I)化合物及其用於治療及/或預防疾病的用途,特別是用於治療及/或預防心血管、心肺和心腎疾病。