发明授权
US5885988A Benzo�g!quinoline derivatives 失效
苯并[g]喹啉衍生物

Benzo�g!quinoline derivatives
摘要:
The invention provides compounds of formula I ##STR1## wherein X, Y, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in the description, and a process for preparing them. The compounds of formula I are useful as pharmaceuticals.
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