发明授权
US5273974A Condensed heterocyclic compounds, their production and use 失效
稠合杂环化合物,其生产和使用

Condensed heterocyclic compounds, their production and use
摘要:
A condensed heterocyclic derivative of the formula (I): ##STR1## wherein X is an oxygen atom, a sulfur atom or R.sup.1 --N
公开/授权文献
信息查询
0/0