求翻译：现有较多丁苯酞治疗缺血性卒中的临床试验发表，提示其安全、有效，但随机对照试验情况尚不清楚。本研究采用Cochrane 系统评价方法，对dl-3- 正丁基苯酞治是什么意思？

Clinical trials for the treatment of ischemic stroke existing more Butylphthalide the published suggesting that its safe, effective, but randomized controlled trials is not clear. In this study, cochrane system evaluation method, dl - 3-n-butyl benzene phthalate governance

More directly, the phthalate treatment of ischemic stroke in clinical trials, and issued its safe, effective, but random testing of contrast is not yet clear. This study used Cochrane system evaluation methods, and the DL - 3 - butyl phthalate free and direct

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More butyl phthalide in treatment of ischemic apoplexy in published clinical trials, prompting them to safe, effective, but randomized controlled trials is not clear. The study using the Cochrane systematic review methods and DL-3-treatment of p-n-butyl phthalate

The existing many butylbenzene tai treatment anemic apoplexy clinical test publication, prompts its security, effectively, but the stochastic check experiment situation still not clear.This research uses the Cochrane system assessment method, tai governs to the dl-3- butylbenzene