| 摘要 |
The present invention is concerned with compounds of formula wherein Z is a substituted indolyl group of formula R1 is hydrogen, amino, lower alkylamino, lower dialkylamino, lower alkyl, halogen, or trifluoromethyl; R2 is hydrogen or lower alkyl; R11 is hydrogen or halogen; R12 is hydrogen or lower alkyl; and a is a single or double bond; or a pharmaceutically acceptable salt.
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