The present invention relates to compounds of formula I: for use in treating pulmonary arterial hypertension and associated conditions, where R1, R2 and R3 are the same or different and signify hydrogens, halogens, alkyl, alkylaryl, alkyloxy, hydroxy, nitro, amino, alkylcarbonylamino, alkylamino or dialkylamino group; R4 signifies hydrogen, alkyl, -alkylaryl or -alkylheteroaryl; X signifies CH2, oxygen atom or sulphur atom; n is 1, 2 or 3, with the proviso that when n is 1, X is not CH2; and the individual (R)- and (S)-enantiomers or mixtures of enantiomers and pharmaceutically acceptable salts thereof.
本发明涉及式I的化合物:用于治疗肺动脉高压及相关疾病,其中R1、R2和R3相同或不同,表示氢、卤素、烷基、烷基芳基、烷氧基、羟基、硝基、
氨基、烷基羰基
氨基、烷基
氨基或二烷基
氨基基团;R4表示氢、烷基、-烷基芳基或-烷基杂芳基;X表示
CH2、氧原子或
硫原子;n为1、2或3,但当n为1时,X不是 ;以及(R)-和(S)-对映体或对映体混合物及其药学上可接受的盐。