Compounds of formula (I) wherein R.sub.1 and R.sub.2 are independently hydrogen or an optionally branched C.sub.1-4 alkyl group; the asterisk marks an asymmetric carbon atom; and the pharmaceutically acceptable salts thereof, useful in cardiovascular field, are described. ##STR1##
描述了
化学式(I)的化合物,其中R.sub.1和R.sub.2独立地是氢或可选的支链C.sub.1-4烷基;星号标记一个不对称的碳原子;以及其药学上可接受的盐,在心血管领域中有用。 ## STR1 ##