* An optical isomer selected from the group consisting of (2'R),(3R)-3,4-dihydro-8-(2'-hydroxy-3'-isopropylamino)-propoxy-3-nitroxy-2H-1-benzopyran, (2'S),(3R)-3,4-dihydro-8-(2'-hydroxy-3'-isopropylamino)propoxy-3-nitroxy-2H-1-benzopyran and acid addition salts of these isomers, process for producing these isomers and a pharmaceutical composition thereof useful for the treatment of cardiovascular diseases.
* 选自以下组别的光学异构体:(2'R)、(3R)-3,4-二氢-8-(2'-羟基-3'-异丙基
氨基)丙氧基-
3-硝基-2H-1-苯并
吡喃、(2'S)、(3R)-3,4-二氢-8-(2'-羟基-3'-异丙基
氨基)丙氧基-
3-硝基-2H-1-苯并
吡喃和这些异构体的酸加成盐、生产这些异构体的工艺及其用于治疗心血管疾病的药物组合物。