Succinic acid esters of -4,5-dihydro-3(2H)-pyridazinones of the formula ##STR1## where R.sub.1 is hydrogen or halo having an atomic weight of from 19 to 36, and R.sub.2 is hydrogen, chloro or lower alkyl having 1 to 4 carbon atoms Are useful as central nervous system depressants, in particular, as muscle relaxants.
公式为##STR1##的-4,5-二氢-3(2H)-
吡啶酮的
琥珀酸酯,其中R.sub.1是氢或原子量为19至36的卤素,R.sub.2是氢,
氯或具有1至4个碳原子的低级烷基。它们可用作中枢神经系统
抑制剂,尤其是作为肌肉松弛剂。